2008 transportation metropolitan Atlanta performance report appendix [2008]

2008 Transportation MAP (Metropolitan Atlanta Performance) Report APPENDIX

38

APPENDIX 2008 Transportation MAP

The Georgia Regional Transportation Authority 245 Peachtree Center Ave., NE Atlanta, GA 30303
404-463-3000 www.grta.org

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

39

APPENDIX
Figure 1: NaviGAtor Video Detection Coverage Freeway Segments

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

40

Figure 2: Travel Times by Freeway Segment

Travel Time (minutes)

Segment 1: I-75 NB (from I-285 to Wade Green Road)

10

66 mph

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)

14.00 12:55 23:59

12
1: NB

14

Travel Time (minutes)

Time of Day

10 12

33 mph

14

16

18

20

22

24

26

28

Time of Day

PM Peak
2002 2005 2006 2007 65 mph Travel Time 35 mph Travel Time

Segment 1: I-75 SB (from Wade Green Road to I-285)

12

14 16

35 mph

18

20

22

24

26

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)

14.55 13:26 24:56

1: SB

Travel Time (minutes)

Travel Time (minutes)

Time of Day

11

65 mph

13

15

Time of Day

PM Peak
2002 2005 2006 2007 65 mph Travel Time 35 mph Travel Time

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

41

Travel Time (minutes)

07
08 66 mph
09
10

Segment 2: I-75 NB (from I-85 to I-285)

AM Peak

Segment Length (miles)

8.45

55 mph Travel Time (minutes:seconds)

9:13

2: NB

Travel Time (minutes)

Time of Day

07

48 mph

08

09

10

11

12

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

07

08

09

58 mph

10

Segment 2: I-75 SB (from I-285 to I-85)

AM Peak

Segment Length (miles)

7.86

55 mph Travel Time (minutes:seconds)

8:34

2: SB

Time of Day

07

PM Peak

08
57 mph 09
Time of Day

2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

42

Travel Time (minutes)

Segment 3: I-75/I-85 NB (from I-20 to I-85)

04

AM Peak

Segment Length (miles)

4.41

55 mph Travel Time (minutes:seconds)

4:49

35 mph Travel Time (minutes:seconds)

7:33

05

06 39 mph
07

3: NB

Travel Time (minutes)

Time of Day

04

05

06

07

42 mph

08

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

Segment 3: I-75/I-85 SB (from I-85 to I-20)

04

AM Peak

Segment Length (miles)

4.40

55 mph Travel Time (minutes:seconds)

4:48

35 mph Travel Time (minutes:seconds)

7:32

05

20 mph Travel Time (minutes:seconds)

13:11

06 42 mph
07

3: SB

Time of Day

04

06

23 mph

08

10

12

14

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time 20 mph Travel Time

Travel Time (minutes)

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

43

03 05 07 09 11
22 mph 13

Segment 4: I-75 NB (from I-85 to I-20)

AM Peak

Segment Length (miles)

3.88

55 mph Travel Time (minutes:seconds)

4:14

35 mph Travel Time (minutes:seconds)

6:39

4: NB

Travel Time (minutes)

Travel Time (minutes)

Time of Day

03

50 mph

04

05

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

03
04 65 mph
05

Segment 4: I-75 SB (from I-20 to I-85)

AM Peak

Segment Length (miles)

3.75

55 mph Travel Time (minutes:seconds)

4:05

4: SB

Time of Day

03

PM Peak

04 55 mph
05
Time of Day

2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

44

Travel Time (minutes)

03
04 53 mph
05

Segment 5: I-75 NB (from I-285 to I-85)

AM Peak

Segment Length (miles)

4.00

55 mph Travel Time (minutes:seconds)

4:22

5: NB

Travel Time (minutes)

Time of Day

03

59 mph

04

05

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

03
04 59 mph
05

Segment 5: I-75 SB (from I-85 to I-285)

AM Peak

Segment Length (miles)

4.12

55 mph Travel Time (minutes:seconds)

4:30

5: SB

Time of Day

03

04

05

06

50 mph

07

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

45

Travel Time (minutes)

Segment 6: I-75 NB (from Hudson Bridge Road to I-285)

10

58 mph

12

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds)

14.53 13:25

14

6: NB

16

Travel Time (minutes)

Time of Day

10

68 mph

12

PM Peak

14 Time of Day

2004 2005 2006 2007 65 mph Travel Time

Travel Time (minutes)

Segment 6: I-75 SB (from I-285 to Hudson Bridge Road)

10

69 mph

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds)

14.45 13:20

12
6: SB
14

Travel Time (minutes)

Time of Day

10

41 mph

12

14

16

18

20

22

Time of Day

PM Peak
2004 2005 2006 2007 65 mph Travel Time

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

46

Travel Time (minutes)

Segment 7: I-85 NB (from I-285 to Old Norcross Road)

09

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds)

10.71 9:53

35 mph Travel Time (minutes:seconds)

18:21

10

11 59 mph
12

7: NB

Travel Time (minutes)

Time of Day

10 12

27 mph

14

16

18

20

22

24

Time of Day

PM Peak
2002 2005 2006 2007 65 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

Segment 7: I-85 SB (from Old Norcross Road to I-285)

09

11

35 mph

13

15

17

19

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)

10.66 9:50 18:16

7: SB

Time of Day

09

10

11

63 mph

12

Time of Day

PM Peak
2002 2005 2006 2007 65 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

47

Travel Time (minutes)

08

09

10

64 mph

11

Segment 8: I-85 NB (from I-75 to I-285)

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds)

9.96 10:52

8: NB

Travel Time (minutes)

Time of Day 08 09 10 11
59 mph 12
Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

09

10

11

12

13

51 mph

14

Segment 8: I-85 SB (from I-285 to I-75)

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds)

10.45 11:24

8: SB

Time of Day

09 10

46 mph

11

12

13

14

15

16

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

48

Travel Time (minutes)

Segment 9: I-85 NB (from Camp Creek Parkway to I-75)

03

68 mph

AM Peak

Segment Length (miles)

4.86

55 mph Travel Time (minutes:seconds)

5:18

04

05

9: NB

06

Travel Time (minutes)

Time of Day

03

72 mph

04

05

06

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

Segment 9: I-85 SB (from I-75 to Camp Creek Parkway)

03

64 mph

AM Peak

Segment Length (miles)

4.20

35 mph mph Travel Time (minutes:seconds) 4:35

04
9: SB
05

Time of Day

03

58 mph

04

05

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

49

Travel Time (minutes)

Segment 10: GA-400 NB (from I-285 to Old Milton Parkway)

12

14

35 mph

16

18

20

22

24

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds) 20 mph Travel Time (minutes:seconds)

13.14 12:08 22:31 39:24

10: NB

Travel Time (minutes)

Time of Day

12 16

25 mph

20

24

28

32

36

40

Time of Day

PM Peak
2002 2003 2004 65 mph Travel Time 35 mph Travel Time 20 mph Travel Time

Segment 10: GA-400 SB (from Old Milton Parkway to I-285)

12 14

28 mph

16

18

20

22

24

26

28

30

AM Peak

Segment Length (miles) 65 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)

13.16 12:09 22:33

10: SB

Travel Time (minutes)

Travel Time (minutes)

Time of Day

12

40 mph

14

16

18

20

22

24

Time of Day

PM Peak
2002 2003 2004 65 mph Travel Time 35 mph Travel Time

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

50

Travel Time (minutes)

Segment 11: I-285 EB (from I-75 to GA-400)

05

41 mph

06

07

08

09

10

11

AM Peak

Segment Length (miles)

6.82

55 mph Travel Time (minutes:seconds)

7:26

11: EB

Travel Time (minutes)

Time of Day

05

60 mph

06

07

08

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

Segment 11: I-285 WB (from GA-400 to I-75)

06

AM Peak

Segment Length (miles)

7.21

55 mph Travel Time (minutes:seconds)

7:52

35 mph Travel Time (minutes:seconds)

12:21

07 63 mph
08

11: WB

Time of Day

07

08

09

10

11

12

13

14

15

29 mph

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

51

Travel Time (minutes)

Segment 12: I-285 EB (from GA-400 to I-85)

05

63 mph

06

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds) 20 mph Travel Time (minutes:seconds)

6.48 7:04 11:06 19:26

07

12: EB

08

Travel Time (minutes)

Time of Day

06

08

10

12

14

16

18

25 mph

20

22

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time 20 mph Travel Time

Segment 12: I-285 WB (from I-85 to GA-400)

05

06

07

08

09

10

11

33 mph

12

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)

6.37 6:57 10:55

12: WB

Travel Time (minutes)

Travel Time (minutes)

Time of Day

05

06

07

08

09

43 mph

10

Time of Day

PM Peak
2002 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

52

Travel Time (minutes)

Segment 13: I-285 NB (from US-78 to I-85)

04 05

31 mph

06

07

08

09

10

11

AM Peak

Segment Length (miles)

5.37

55 mph Travel Time (minutes:seconds)

5:51

35 mph Travel Time (minutes:seconds)

9:12

13: NB

Travel Time (minutes)

Time of Day

05

55 mph

06

07

08

09

10

Time of Day

PM Peak
2004 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

Segment 13: I-285 SB (from I-85 to US-78)

05
06 61 mph
07

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds) 20 mph Travel Time (minutes:seconds)
13: SB

5.89 6:26 10:05 17:39

Travel Time (minutes)

Time of Day

06

08

10

12

14

16

22 mph

18

Time of Day

PM Peak
2004 2005 2006 2007 55 mph Travel Time 35 mph Travel Time 20 mph Travel Time

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

53

Travel Time (minutes)

Segment 14: I-285 NB (from I-20 to US-78)

06

30 mph

08

10

12

14

16

18

AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds) 35 mph Travel Time (minutes:seconds)
14: NB

8.20 8:57 14:03

Time of Day

08

PM Peak

Travel Time (minutes)

09
51 mph 10
Time of Day

2004 2005 2006 2007 55 mph Travel Time 35 mph Travel Time

Travel Time (minutes)

Segment 14: I-285 SB (from US-78 to I-20)

06

AM Peak

AM Peak

Segment Length (miles)

7.45

55 mph Travel Time (minutes:seconds)

8:08

07

08 62 mph
09

14: SB

Time of Day

07

PM Peak

PM Peak

08

09 47 mph
10
Time of Day

2004 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

54

Travel Time (minutes)

Segment 15: I-20 EB (from I-285 to I-75/I-85)

05

58 mph

06

AM Peak

AM Peak

Segment Length (miles)

6.43

55 mph Travel Time (minutes:seconds)

7:01

07

15: EB

08

Travel Time (minutes)

Time of Day

05

64 mph

06

PM Peak PM Peak

07

08

Time of Day

2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

Segment 15: I-20 WB (from I-75/I-85 to I-285)

06

63 mph

AM Peak

Segment Length (miles)

7.12

55 mph Travel Time (minutes:seconds)

7:46

07
15: WB
08

Time of Day

06 58 mph

PM PeakPM Peak

07

08

Time of Day

2002 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

55

Travel Time (minutes)

Segment 16: I-20 EB (from I-75/I-85 to I-285)

08

65 mph

09

AM Peak AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds)

9.85 10:45

10

11

16: EB

12

Travel Time (minutes)

Time of Day

08

52 mph

09

10

11

12

13

PM Peak PM Peak

Time of Day

2003 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

Segment 16: I-20 WB (from I-285 to I-75/I-85)

08

09

10

11

12

13

43 mph

14

AM Peak AM Peak

Segment Length (miles) 55 mph Travel Time (minutes:seconds)

9.39 10:15

16: WB

Time of Day

08

PM PeakPM Peak

09

10

65 mph

11

Time of Day

2003 2005 2006 2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

56

Travel Time (minutes)

Segment 17: I-285 NB (from Airport Tunnel to I-675)

04

68 mph

05

AM Peak

Segment Length (miles)

6.22

mph Travel Time (minutes:seconds)

6:47

06

07

17: NB

08

Travel Time (minutes)

Time of Day

04

63 mph

05

06

07

08

Time of Day

PM Peak
2007 55 mph Travel Time

Travel Time (minutes)

Segment 17: I-285 SB (from I-675 to Airport Tunnel)

04

AM Peak

Segment Length (miles)

6.26

05

mph Travel Time (minutes:seconds)

6:50

06

07

68 mph

08

17: SB

Time of Day
04 05 06 07
66 mph 08
Time of Day

PM Peak
2007 55 mph Travel Time

Travel Time (minutes)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

57

Travel Time (minutes)

Segment 18: I-285 NB (from I-675 to I-20)

04

59 mph

05

06

07

08

09

10

AM Peak

Segment Length (miles)

5.98

mph Travel Time (minutes:seconds)

6:31

18: NB

Travel Time (minutes)

Time of Day

04

05

06

07

08

09

55 mph

10

Time of Day

PM Peak
2007 55 mph Travel Time

Segment 18: I-285 SB (from I-20 to I-567)

04

05

06

07

08

09

66 mph

10

AM Peak

AM Peak

Segment Length (miles)

6.14

mph Travel Time (minutes:seconds)

6:42

18: SB

Travel Time (minutes)

Travel Time (minutes)

Time of Day

04

05

06

07

08

09

61 mph

10

PM Peak PM Peak
2007 55 mph Travel Time

Time of Day

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

58

Figure 3: Planning Time Index by Freeway Segment

Planning Time Index

Segment 1: I-75 NB (from I-285 to Wade Green Road)

3.2 3.0

AM Peak

Segment Length (miles)

14.00

2.8

Free-flow (65 mph) Travel Time (minutes) 12.9

2.6

2.4

2.2

2.0

1.8 1.6 1.4

1: NB

1.2

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

3.2

PM Peak

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2 1.0

2002

0.8

2005

2006

2007

Time of Day

Segment 1: I-75 SB (from Wade Green Road to I-285)

3.2 3.0

AM Peak

Segment Length (miles)

14.55

2.8

Free-flow (65 mph) Travel Time (minutes) 13.4

2.6

2.4

2.2

2.0

1.8 1.6 1.4

1: SB

1.2

1.0

0.8

Time of Day

3.2

PM Peak

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

2002

0.8

2005

2006

Time of Day

2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

Planning Time Index

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

59

Planning Time Index

Segment 2: I-75 NB (from I-85 to I-285)

2.4 2.2

AM Peak

Segment Length (miles)

8.45

Free-flow (55 mph) Travel Time (minutes) 9.2

2.0

1.8

1.6 1.4

2: NB

1.2

1.0

0.8

Planning Time Index

Time of Day

2.4

PM Peak

2.2 2.0

1.8

1.6 1.4 1.2

1.0

0.8

2002

2005

2006

Time of Day

2007

Segment 2: I-75 SB (from I-285 to I-85)

2.4 2.2

AM Peak

Segment Length (miles)

7.86

Free-flow (55 mph) Travel Time (minutes) 8.6

2.0

1.8

1.6 1.4

2: SB

1.2

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

2.4

PM Peak

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

2002

2005

2006

Time of Day

2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

60

Planning Time Index

Segment 3: I-75/I-85 NB (from I-20 to I-85)

3.8

AM Peak

Segment Length (miles)

4.41

Free-flow (55 mph) Travel Time (minutes) 4.8

3.3

2.8

2.3

3: NB

1.8

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3 0.8
Time of Day

2002 2005 2006 2007

Segment 3: I-75/I-85 SB (from I-85 to I-20)

3.8

AM Peak

Segment Length (miles)

4.40

Free-flow (55 mph) Travel Time (minutes) 4.8

3.3

2.8

2.3

3: SB

1.8

1.3

0.8

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3

0.8

Time of Day
Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2002 2005 2006 2007

Planning Time Index

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

61

Planning Time Index

Segment 4: I-75 NB (from I-85 to I-20)

4.3

AM Peak

Segment Length (miles)

3.88

Free-flow (55 mph) Travel Time (minutes) 4.2

3.8

3.3

2.8

2.3

4: NB

1.8

1.3

0.8

Planning Time Index

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3 0.8
Time of Day

2002 2005 2006 2007

Segment 4: I-75 SB (from I-20 to I-85)

3.8

AM Peak

Segment Length (miles)

3.75

Free-flow (55 mph) Travel Time (minutes) 4.1

3.3

2.8

2.3

4: SB

1.8

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3

0.8 Time of Day

2002 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

62

Planning Time Index

Segment 5: I-75 NB (from I-285 to I-85)

2.2

AM Peak

Segment Length (miles)

4.00

Free-flow (55 mph) Travel Time (minutes) 4.4

2.0

1.8

1.6

1.4

5: NB

1.2

1.0

0.8

Planning Time Index

Time of Day

2.2

PM Peak

2.0

1.8

1.6

1.4

1.2

1.0

2002

0.8

2005

2006

2007

Time of Day

Segment 5: I-75 SB (from I-85 to I-285)

2.2

AM Peak

Segment Length (miles)

4.12

Free-flow (55 mph) Travel Time (minutes) 4.5

2.0

1.8

1.6

1.4

5: SB

1.2

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

2.2

PM Peak

2.0

1.8

1.6

1.4

1.2

1.0

2002

0.8

2005

2006

Time of Day

2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

63

Planning Time Index

Segment 6: I-75 NB (from Hudson Bridge Road to I-285)

3.2 3.0

AM Peak

Segment Length (miles)

14.53

2.8 2.6

Free-flow (65 mph) Travel Time (minutes) 13.4

2.4

2.2

2.0

1.8 1.6 1.4

6: NB

1.2

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

3.2

PM Peak

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4 1.2

2004

1.0 0.8

2005

2006

2007

Time of Day

Segment 6: I-75 SB (from I-285 to Hudson Bridge Road)

3.2 3.0

AM Peak

Segment Length (miles)

14.45

2.8

Free-flow (65 mph) Travel Time (minutes) 13.3

2.6

2.4

2.2

2.0

1.8 1.6 1.4

6: SB

1.2

1.0

0.8

Time of Day

3.2

PM Peak

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

2004

1.4 1.2

2005

1.0

2006

0.8

2007

Time of Day
Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

Planning Time Index

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

64

Planning Time Index

Planning Time Index

Segment 7: I-85 NB (from I-285 to Old Norcross Road)

AM Peak

Segment Length (miles)

10.71

2.8

Free-flow (65 mph) Travel Time (minutes) 9.9

2.3

1.8

7: NB

1.3

0.8

Time of Day PM Peak
2.8

2.3

1.8

1.3 0.8
Time of Day

2002 2005 2006 2007

Segment 7: I-85 SB (from Old Norcross Road to I-285)

AM Peak

2.8

Segment Length (miles)

10.66

Free-flow (65 mph) Travel Time (minutes) 9.8

2.3

1.8

1.3

7: SB

0.8

Planning Time Index

Planning Time Index

Time of Day
PM Peak 2.8

2.3

1.8

1.3 0.8
Time of Day

2002 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

65

Planning Time Index

Planning Time Index

Segment 8: I-85 NB (from I-75 to I-285)

AM Peak

Segment Length (miles)

9.96

2.0

Free-flow (55 mph) Travel Time (minutes) 10.9

1.8

1.6

1.4

8: NB

1.2

1.0

0.8

Time of Day

2.0

PM Peak

1.8

1.6

1.4

1.2

1.0 0.8
Time of Day

2002 2005 2006 2007

Segment 8: I-85 SB (from I-285 to I-75)

2.0

AM Peak

Segment Length (miles)

10.45

Free-flow (55 mph) Travel Time (minutes) 11.4

1.8

1.6

1.4 1.2

8: SB

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

2.0

PM Peak

1.8

1.6

1.4

1.2

1.0 0.8
Time of Day

2002 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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66

Planning Time Index

Segment 9: I-85 NB (from Camp Creek Parkway to I-75)

1.4

AM Peak

Segment Length (miles)

4.86

Free-flow (55 mph) Travel Time (minutes) 5.3

1.3

1.2

1.1 1.0

9: NB

0.9

0.8

Planning Time Index

Time of Day

1.4

PM Peak

1.3

1.2

1.1

1.0

0.9 0.8
Time of Day

2002 2005 2006 2007

Segment 9: I-85 SB (from I-75 to Camp Creek Parkway)

1.4

AM Peak

Segment Length (miles)

4.20

Free-flow (55 mph) Travel Time (minutes) 4.6

1.3

1.2

1.1 1.0

9: SB

0.9

0.8

Planning Time Index

Planning Time Index

Time of Day

1.4

PM Peak

1.3

1.2

1.1

1.0

0.9 0.8
Time of Day

2002 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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67

Planning Time Index

Segment 10: GA-400 NB (from I-285 to Old Milton Parkway)

4.3

AM Peak

Segment Length (miles)

13.14

Free-flow (65 mph) Travel Time (minutes) 12.1

3.8

3.3

2.8

2.3

1.8 1.3

10: NB

0.8

Planning Time Index

Planning Time Index

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

0.8

2002

2003

Time of Day

2004

Segment 10: GA-400 SB (from Old Milton Parkway to I-285)

4.3

AM Peak

Segment Length (miles)

13.16

Free-flow (65 mph) Travel Time (minutes) 12.1

3.8

3.3

2.8

2.3 1.8

10: SB

1.3

0.8

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

2002

0.8

2003

2004

Time of Day
Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

Planning Time Index

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

68

Planning Time Index

Segment 11: I-285 EB (from I-75 to GA-400)

3.3

AM Peak

Segment Length (miles)

6.82

Free-flow (55 mph) Travel Time (minutes) 7.4

2.8

2.3

1.8

11: EB

1.3

0.8

Planning Time Index

Time of Day

3.3

PM Peak

2.8

2.3

1.8

1.3 0.8
Time of Day

2002 2005 2006 2007

Segment 11: I-285 WB (from GA-400 to I-75)

3.3

AM Peak

Segment Length (miles)

7.21

Free-flow (55 mph) Travel Time (minutes) 7.9

2.8

2.3

1.8

11: WB

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day PM Peak
3.3 2.8 2.3 1.8 1.3 0.8
Time of Day Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2002 2005 2006 2007

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

69

Planning Time Index

Segment 12: I-285 EB (from GA-400 to I-85)

4.3

AM Peak

Segment Length (miles)

6.48

Free-flow (55 mph) Travel Time (minutes) 7.1

3.8

3.3

2.8

2.3 1.8

12: EB

1.3

0.8

Planning Time Index

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

0.8

2002

2005

2006

Time of Day

2007

Segment 12: I-285 EB (from I-85 to GA-400)

4.3

AM Peak

Segment Length (miles)

6.37

Free-flow (55 mph) Travel Time (minutes) 6.9

3.8

3.3

2.8

2.3

12: WB

1.8

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

2002

0.8

2005

2006

Time of Day

2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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70

Planning Time Index

Planning Time Index

Segment 13: I-285 NB (from US-78 to I-85)

4.3

AM Peak

Segment Length (miles)

5.37

3.8

Free-flow (55 mph) Travel Time (minutes) 5.9

3.3

2.8

2.3 1.8

13: NB

1.3

0.8

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

0.8

2004

2005

Time of Day

2006 2007

Segment 13: I-285 SB (from I-85 to US-78)

4.3

AM Peak

Segment Length (miles)

5.89

3.8

Free-flow (55 mph) Travel Time (minutes) 6.4

3.3

2.8

2.3

1.8

13: SB

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day

4.3

PM Peak

3.8

3.3

2.8

2.3

1.8

1.3

0.8

2004

2005

Time of Day

2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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71

Planning Time Index

Segment 14: I-285 NB (from I-20 to US-78)

3.8

AM Peak

Segment Length (miles)

8.20

3.3

Free-flow (55 mph) Travel Time (minutes) 8.9

2.8

2.3

1.8

14: NB

1.3

0.8

Planning Time Index

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3

0.8 Time of Day

2004 2005 2006 2007

Segment 14: I-285 SB (from US-78 to I-20)

3.8

AM Peak

Segment Length (miles)

7.45

3.3

Free-flow (55 mph) Travel Time (minutes) 8.1

2.8

2.3

1.8

14: SB

1.3

0.8

Planning Time Index

Planning Time Index

Time of Day

3.8

PM Peak

3.3

2.8

2.3

1.8

1.3

0.8 Time of Day

2004 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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72

Planning Time Index

Planning Time Index

Segment 15: I-20 EB (from I-285 to I-75/I-85)

1.5

AM Peak

Segment Length (miles)

6.43

1.4

Free-flow (55 mph) Travel Time (minutes) 7.0

1.3

1.2

1.1 1.0

15: EB

0.9

0.8

Time of Day

1.5

PM Peak

1.4

1.3

1.2

1.1

1.0

0.9

A

0.8

2002

2005

Time of Day

2006 2007

Segment 15: I-20 WB (from I-75/I-85 to I-285)

1.5

AM Peak

Segment Length (miles)

7.12

1.4

Free-flow (55 mph) Travel Time (minutes) 7.8

1.3

1.2

1.1 1.0

15: WB

0.9

0.8

Planning Time Index

Planning Time Index

Time of Day

1.5

PM Peak

1.4

1.3

1.2

1.1

1.0

0.9

0.8

2002

2005

Time of Day

2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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73

Planning Time Index

Segment 16: I-20 EB (from I-75/I-85 to I-285)

2.2

AM Peak

Segment Length (miles)

9.85

2.0

Free-flow (55 mph) Travel Time (minutes) 10.7

1.8

1.6

1.4 1.2

16: EB

1.0

0.8

Planning Time Index

Time of Day

2.2

PM Peak

2.0

1.8

1.6

1.4

1.2

1.0

0.8

2003

2005

Time of Day

2006 2007

Segment 16: I-20 WB (from I-285 to I-75/I-85)

2.2

AM Peak

Segment Length (miles)

9.39

2.0

Free-flow (55 mph) Travel Time (minutes) 10.2

1.8

1.6

1.4 1.2

16: WB

1.0

0.8

Planning Time Index

Planning Time Index

Time of Day

PM Peak

2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8
Time of Day

2003 2005 2006 2007

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

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74

Planning Time Index

Segment 17: I-285 NB (from Airport Tunnel to I-675)

1.2

AM Peak

Segment Length (miles)

6.22

1.1

Free-flow ( mph) Travel Time (minutes)

6.8

1.0

0.9

0.8

17: NB

0.7

0.6

Planning Time Index

Time of Day

1.2

PM Peak

1.1

1.0

0.9

0.8

0.7

0.6

2007

Planning Time Index

Time of Day

Segment 17: I-285 SB (from I-675 to Airport Tunnel)

AM Peak

1.2

Segment Length (miles)

6.26

1.1

Free-flow ( mph) Travel Time (minutes)

6.8

1.0

0.9

0.8

17: SB

0.7

0.6

Planning Time Index

Time of Day

1.2

PM Peak

1.1

1.0

0.9

0.8

0.7

0.6

2007

Time of Day

Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

75

Planning Time Index

Segment 18: I-285 NB (from I-675 to I-20)

2.0

AM Peak

Segment Length (miles)

5.98

1.8

Free-flow ( mph) Travel Time (minutes)

0.0

1.6

1.4

1.2

18: NB

1.0

0.8

Planning Time Index

Time of Day

2.0

PM Peak

1.8

1.6

1.4

1.2

1.0

0.8

2007

Planning Time Index

Time of Day

Segment 18: I-285 SB (from I-20 to I-567)

AM Peak

2.0

Segment Length (miles)

6.14

1.8

Free-flow ( mph) Travel Time (minutes)

0.0

1.6

1.4

1.2

18: SB

1.0

0.8

Planning Time Index

Time of Day PM Peak
2.0 1.8 1.6 1.4 1.2 1.0 0.8
Time of Day
Note: Planning Time Index is expressed as the ratio of the planning time and free-flow travel time. Planning time represents the amount of time needed to be on-time 95 percent of the time.

2007

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

76

Figure 4: Buffer Time Index by Freeway Segment

Buffer Time Index (%)

Segment 1: I-75 NB (from I-285 to Wade Green Road)

80 70

AM Peak

Segment Length (miles)

14.00

Free-flow (65 mph) Travel Time (minutes) 12.9

60

50

40

30 20

1: NB

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

80

PM Peak

70

60

50

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Segment 1: I-75 SB (from Wade Green Road to I-285)

80 70

AM Peak

Segment Length (miles)

14.55

Free-flow (65 mph) Travel Time (minutes) 13.4

60

50

40

30 20

1: SB

10

0

Time of Day

80

PM Peak

70

60

50

40 30

20

10

2002

0

2005

2006

2007

Time of Day

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

Buffer Time Index (%)

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77

Buffer Time Index (%)

Segment 2: I-75 NB (from I-85 to I-285)

100 90

AM Peak

Segment Length (miles)

8.45

Free-flow (55 mph) Travel Time (minutes) 9.2

80

70

60

50 40 30

2: NB

20

10

0

Buffer Time Index (%)

Time of Day

100

PM Peak

90

80

70

60

50

40

30

20

10

0

2002

2005

2006

Time of Day

2007

Segment 2: I-75 SB (from I-285 to I-85)

100 90

AM Peak

Segment Length (miles)

7.86

Free-flow (55 mph) Travel Time (minutes) 8.6

80

70

60

50 40

2: SB

30

20

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

100

PM Peak

90

80

70

60

50

40

30

20

10

0

2002

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

78

Buffer Time Index (%)

Segment 3: I-75/I-85 NB (from I-20 to I-85)

120

AM Peak

Segment Length (miles)

4.41

Free-flow (55 mph) Travel Time (minutes) 4.8

100

80

60

3: NB

40

20

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

120

PM Peak

100

80

60

40

20 0
Time of Day

2002 2005 2006 2007

Segment 3: I-75/I-85 SB (from I-85 to I-20)

120

AM Peak

Segment Length (miles)

4.40

Free-flow (55 mph) Travel Time (minutes) 4.8

100

80

60

3: SB

40

20

0

Time of Day

120

PM Peak

100

80

60

40

20

2002

0

2005

2006

2007

Time of Day

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

Buffer Time Index (%)

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

79

Buffer Time Index (%)

Segment 4: I-75 NB (from I-85 to I-20)

180 160

AM Peak

Segment Length (miles)

3.88

Free-flow (55 mph) Travel Time (minutes) 4.2

140

120

100

80 60

4: NB

40

20

0

Buffer Time Index (%)

Time of Day

180

PM Peak

160

140

120

100

80

60

40

20

2002

0

2005

2006

Time of Day

2007

Segment 4: I-75 SB (from I-20 to I-85)

180 160

AM Peak

Segment Length (miles)

3.75

Free-flow (55 mph) Travel Time (minutes) 4.1

140

120

100 80

4: SB

60

40

20

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

180

PM Peak

160

140

120

100

80

60

40

20

0

2002

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

80

Buffer Time Index (%)

Segment 5: I-75 NB (from I-285 to I-85)

80 70

AM Peak

Segment Length (miles)

4.00

Free-flow (55 mph) Travel Time (minutes) 4.4

60

50

40 30

5: NB

20

10

0

Buffer Time Index (%)

Time of Day

80

PM Peak

70

60

50

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Segment 5: I-75 SB (from I-85 to I-285)

80 70

AM Peak

Segment Length (miles)

4.12

Free-flow (55 mph) Travel Time (minutes) 4.5

60

50

40 30

5: SB

20

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

80

PM Peak

70

60

50

40

30

20

2002

10

2005

0

2006

2007

Time of Day

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

81

Buffer Time Index (%)

Segment 6: I-75 NB (from Hudson Bridge Road to I-285)

120

AM Peak

Segment Length (miles)

14.53

100

Free-flow (65 mph) Travel Time (minutes) 13.4

80

60

40

6: NB

20

0

Buffer Time Index (%)

Time of Day

120

PM Peak

100

80

60

2004

40

2005

20

2006

0

2007

Buffer Time Index (%)

Time of Day

Segment 6: I-75 SB (from I-285 to Hudson Bridge Road)

120

AM Peak

Segment Length (miles)

14.45

100

Free-flow (65 mph) Travel Time (minutes) 13.3

80

60

40

6: SB

20

0

Buffer Time Index (%)

Time of Day

120

PM Peak

100

80

60

2004

40

2005

20

2006

0

2007

Time of Day
Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

82

Buffer Time Index (%)

Buffer Time Index (%)

Segment 7: I-85 NB (from I-285 to Old Norcross Road)

70

AM Peak

Segment Length (miles)

10.71

Free-flow (65 mph) Travel Time (minutes) 9.9

60

50

40

30

7: NB

20

10

0

Time of Day

70

PM Peak

60

50

40

30

20

10

2002

0

2005

2006

Time of Day

2007

Segment 7: I-85 SB (from Old Norcross Road to I-285)

70

AM Peak

Segment Length (miles)

10.66

60

Free-flow (65 mph) Travel Time (minutes) 9.8

50

40

30 20

7: SB

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

70

PM Peak

60

50

40

30

20

10

2002

0

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

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83

Buffer Time Index (%)

Buffer Time Index (%)

Segment 8: I-85 NB (from I-75 to I-285)

AM Peak

Segment Length (miles)

9.96

70

Free-flow (55 mph) Travel Time (minutes) 10.9

60

50

40 30

8: NB

20

10

0

Time of Day

70

PM Peak

60

50

40

30

20

10

0

2002

2005

2006

Time of Day

2007

Segment 8: I-85 SB (from I-285 to I-75)

70

AM Peak

Segment Length (miles)

10.45

Free-flow (55 mph) Travel Time (minutes) 11.4

60

50

40

30

8: SB

20

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

70

PM Peak

60

50

40

30

20

10

0

2002

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

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84

Buffer Time Index (%)

Segment 9: I-85 NB (from Camp Creek Parkway to I-75)

60

AM Peak

Segment Length (miles)

4.86

Free-flow (55 mph) Travel Time (minutes) 5.3

50

40

30 20

9: NB

10

0

Buffer Time Index (%)

Time of Day

60

PM Peak

50

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Segment 9: I-85 SB (from I-75 to Camp Creek Parkway)

60

AM Peak

Segment Length (miles)

4.20

Free-flow (55 mph) Travel Time (minutes) 4.6

50

40

30

9: SB

20

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

60

PM Peak

50

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

85

Buffer Time Index (%)

Segment 10: GA-400 NB (from I-285 to Old Milton Parkway)

100 90

AM Peak

Segment Length (miles)

13.14

Free-flow (65 mph) Travel Time (minutes) 12.1

80

70

60

50

40

30 20

10: NB

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

100

PM Peak

90

80

70

60

50

40

30

20

10

0

2002

2003

Time of Day

2004

Segment 10: GA-400 SB (from Old Milton Parkway to I-285)

100 90

AM Peak

Segment Length (miles)

13.16

Free-flow (65 mph) Travel Time (minutes) 12.1

80

70

60

50

40 30

10: SB

20

10

0

Time of Day

100

PM Peak

90

80

70

60

50

40

30

20

10

2002

0

2003

2004

Time of Day
Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

Buffer Time Index (%)

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86

Buffer Time Index (%)

Segment 11: I-285 EB (from I-75 to GA-400)

100 90

AM Peak

Segment Length (miles)

6.82

Free-flow (55 mph) Travel Time (minutes) 7.4

80

70

60

50 40

11: EB

30

20

10

0

Buffer Time Index (%)

Time of Day

100

PM Peak

90

80

70

60

50

40

30

2002

20 10

2005

0

2006

2007

Time of Day

Segment 11: I-285 WB (from GA-400 to I-75)

100 90

AM Peak

Segment Length (miles)

7.21

Free-flow (55 mph) Travel Time (minutes) 7.9

80

70

60

50

40 30

11: WB

20

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

PM Peak

100

90

80

70

60

50

40

30

20

10

2002

0

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

87

Buffer Time Index (%)

Segment 12: I-285 EB (from GA-400 to I-85)

120

AM Peak

Segment Length (miles)

6.48

Free-flow (55 mph) Travel Time (minutes) 7.1

100

80

60

40

12: EB

20

0

Buffer Time Index (%)

Time of Day

120

PM Peak

100

80

60

40

20

0 Time of Day

2002 2005 2006 2007

Segment 12: I-285 EB (from I-85 to GA-400)

120

AM Peak

Segment Length (miles)

6.37

Free-flow (55 mph) Travel Time (minutes) 6.9

100

80

60

12: WB

40

20

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

120

PM Peak

100

80

60

40

20

2002

0

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

88

Buffer Time Index (%)

Buffer Time Index (%)

Segment 13: I-285 NB (from US-78 to I-85)

140

AM Peak

Segment Length (miles)

5.37

120

Free-flow (55 mph) Travel Time (minutes) 5.9

100

80

60 40

13: NB

20

0

Time of Day

140

PM Peak

120

100

80

60

40

20

2004

0

2005

2006

2007

Time of Day

Segment 13: I-285 SB (from I-85 to US-78)

140

AM Peak

Segment Length (miles)

5.89

120

Free-flow (55 mph) Travel Time (minutes) 6.4

100

80

60 40

13: SB

20

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

140

PM Peak

120

100

80

60

40

20

0

2004

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

89

Buffer Time Index (%)

Segment 14: I-285 NB (from I-20 to US-78)

160 140

AM Peak

Segment Length (miles)

8.20

Free-flow (55 mph) Travel Time (minutes) 8.9

120

100

80 60

14: NB

40

20

0

Buffer Time Index (%)

Time of Day

160

PM Peak

140

120

100

80

60

40 20

2004

0

2005

2006

2007

Time of Day

Segment 14: I-285 SB (from US-78 to I-20)

160 140

AM Peak AM Peak

Segment Length (miles)

7.45

Free-flow (55 mph) Travel Time (minutes) 8.1

120

100

80

60 40

14: SB

20

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

160

PM Peak

140

PM Peak

120

100

80

60

40

2004

20

2005

0

2006

2007

Time of Day
Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

90

Buffer Time Index (%)

Segment 15: I-20 EB (from I-285 to I-75/I-85)

60 50

AM Peak AM Peak

Segment Length (miles)

6.43

Free-flow (55 mph) Travel Time (minutes) 7.0

40

30

20

15: EB

10

0

Buffer Time Index (%)

Time of Day

60

PM Peak

50

PM Peak

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Segment 15: I-20 WB (from I-75/I-85 to I-285)

60

AM Peak

Segment Length (miles)

7.12

50

Free-flow (55 mph) Travel Time (minutes) 7.8

40

AM Peak

30

20

15: WB

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

60

PM PeakPM Peak

50

40

30

20

10

2002

0

2005

2006

2007

Time of Day

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

91

Buffer Time Index (%)

Segment 16: I-20 EB (from I-75/I-85 to I-285)

80 70

AM Peak

Segment Length (miles)

9.85

Free-flow (55 mph) Travel Time (minutes) 10.7

60

50

40

30 20

16: EB

10

0

Buffer Time Index (%)

Time of Day

80

PM Peak

70

PM Peak

60

50

40

30

20

10

0

2003

2005

2006

Time of Day

2007

Segment 16: I-20 WB (from I-285 to I-75/I-85)

80 70

AM Peak AM Peak

Segment Length (miles)

9.39

Free-flow (55 mph) Travel Time (minutes) 10.2

60

50

40

30 20

16: WB

10

0

Buffer Time Index (%)

Buffer Time Index (%)

Time of Day

PM Peak

80

70 60 50

40

30 20

10

2003

0

2005

2006

Time of Day

2007

Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

92

Buffer Time Index (%)

Segment 17: I-285 NB (from Airport Tunnel to I-675)

30 25

AM Peak

AM Peak

Segment Length (miles)

6.22

Free-flow ( mph) Travel Time (minutes)

6.8

20

15

10

17: NB

5

0

Buffer Time Index (%)

Time of Day

30

PM Peak

PM Peak

25

20

15

10

5

A

0

2007

Buffer Time Index (%)

Time of Day

Segment 17: I-285 SB (from I-675 to Airport Tunnel)

AM Peak

30 25

AM Peak

Segment Length (miles)

6.26

Free-flow ( mph) Travel Time (minutes)

6.8

20

15

10

17: SB

5

0

Buffer Time Index (%)

Time of Day

PM Peak

30

25

20

15

10

5

0

2007

Time of Day
Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

2008 Transportation MAP (Metropolitan Atlanta Performance) Appendix

93

Buffer Time Index (%)

Segment 18: I-285 NB (from I-675 to I-20)

90 80 70

AM Peak

AM Peak

Segment Length (miles)

5.98

Free-flow ( mph) Travel Time (minutes)

6.5

60

50

40 30

18: NB

20

10

0

Buffer Time Index (%)

Time of Day

90

PM Peak

80

PM Peak

70

60

50

40

30

20

A

10

0

2007

Buffer Time Index (%)

Time of Day

Segment 18: I-285 SB (from I-20 to I-567)

AM Peak

90 80

AM Peak

Segment Length (miles)

6.14

Free-flow ( mph) Travel Time (minutes)

6.7

70

60

50

40 30

18: SB

20

10

0

Buffer Time Index (%)

Time of Day

PM Peak

90

80

70

60

50

40

30

20

10

0

2007

Time of Day
Note: Buffer Time Index represents the amount of extra "buffer" needed to be on-time 95 percent of the time and is expressed as a percentage of the average travel time.

The Georgia Regional Transportation Authority 245 Peachtree Center Ave., NE Atlanta, GA 30303
404-463-3000 www.grta.org