Rural Public Transportation Technologies: User Needs and Applications FR1-798
Table 56. Accident Type Distribution by Ramp Segment Type for
Rural Diamond Off-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
20.4 0.3 70.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
21 1 162 - - - - - - - 155 0 0 |
6.2 0.3 47.8 - - - - - - - 45.7 0.0 0.0 |
2 0 2 - - - - - - - 2 0 0 |
0.6 0.0 7.1 - - - - - - - 0.6 0.0 0.0 |
5 0 24 - - - - - - - 3 0 0 |
1.5 0.0 7.1 - - - - - - - 0.9 0.0 0.0 |
0 0 6 - - - - - - - 5 0 0 |
0.0 0.0 1.8 - - - - - - - 1.5 0.0 0.0 |
7 0 32 - - - - - - - 10 0 0 |
2.1 0.0 9.4 - - - - - - - 3.0 0.0 0.0 |
Total |
91.3 |
339 |
100.0 |
6 |
1.8 |
32 |
9.4 |
11 |
3.2 |
49 |
14.5 |
Conversion: 1 mi = 1.61 km
Table 56. Accident Type Distribution by Ramp Segment Type for
Rural Diamond Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
20.4 0.3 70.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
21 1 162 - - - - - - - 155 0 0 |
6.2 0.3 47.9 - - - - - - - 45.7 0.0 0.0 |
1 0 0 - - - - - - - 0 0 0 |
0.3 0.0 0.0 - - - - - - - 0.0 0.0 0.0 |
0 0 1 - - - - - - - 2 0 0 |
0.0 0.0 0.3 - - - - - - - 0.6 0.0 0.0 |
0 0 0 - - - - - - - 1 0 0 |
0.0 0.0 0.0 - - - - - - - 0.3 0.0 0.0 |
5 0 37 - - - - - - - 11 0 0 |
1.5 0.0 10.9 - - - - - - - 3.2 0.0 0.0 |
0 0 8 - - - - - - - 0 0 0 |
0.0 0.0 2.4 - - - - - - - 0.0 0.0 0.0 |
6 0 46 - - - - - - - 14 0 0 |
1.8 0.0 13.6 - - - - - - - 4.1 0.0 0.0 |
Total |
91.3 |
339 |
100.0 |
1 |
0.3 |
3 |
0.9 |
1 |
0.3 |
53 |
15.6 |
8 |
2.4 |
66 |
19.5 |
Conversion: 1 mi = 1.61 km
Table 56. Accident Type Distribution by Ramp Segment Type for
Rural Diamond Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
20.4 0.3 70.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
21 1 162 - - - - - - - 155 0 0 |
6.2 0.3 47.8 - - - - - - - 45.7 0.0 0.0 |
0 0 1 - - - - - - - 0 0 - |
0.0 0.0 0.3 - - - - - - - 0.0 0.0 0.0 |
0 0 0 - - - - - - - 0 0 0 |
0.0 0.0 0.0 - - - - - - - 0.0 0.0 0.0 |
2 1 43 - - - - - - - 53 0 0 |
0.6 0.3 12.7 - - - - - - - 15.6 0.0 0.0 |
5 0 30 - - - - - - - 16 0 0 |
1.5 0.0 8.9 - - -
- - - - 4.7 0.0 0.0 |
0 0 0 - - - - - - - 23 0 0 |
0.0 0.0 0.0 - - - - - - - 6.8 0.0 0.0 |
0 0 0 - - - - - - - 33 0 0 |
0.0 0.0 0.0 - - - - - - - 9.7 0.0 0.0 |
1 0 10 - - - - - - - 6 0 0 |
0.3 0.0 3.0 - - - - - - - 1.8 0.0 0.0 |
8 1 84 - - - - - - - 131 0 0 |
2.4 0.3 24.8 - - - - - - - 38.6 0.0 0.0 |
Total |
91.3 |
339 |
100.0 |
1 |
0.3 |
0 |
0.0 |
99 |
29.2 |
51 |
15.0 |
23 |
6.8 |
33 |
9.7 |
17 |
5.0 |
224 |
66.1 |
Conversion: 1 mi = 1.61 km
Table 57. Accident Type Distribution by Ramp Segment Type for
Rural Diamond On-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.0 0.0 36.6 47.8 0.4 0.0 0.0 0.0 0.0 0.0 - - - |
- - 10 69 - - - - - - 64 0 0 |
- - 7.0 - - - - - - - 44.8 0.0 0.0 |
- - 0 4 - - - - - - 0 0 0 |
- - 0.0 2.8 - - - - - - 0.0 0.0 0.0 |
- - 10 - - - - - - - 3 0 0 |
- - 0.0 7.0 - - - - - - 0.0 0.0 0.0 |
- - 0 3 - - - - - - 0 0 0 |
- - 0.0 2.1 - - - - - - 0.0 0.0 0.0 |
- - 0 17 - - - - - - 3 0 0 |
- - 0.0 11.9 - - - - - - 2.1 0.0 0.0 |
Total |
84.8 |
143 |
100.0 |
4 |
2.8 |
13 |
9.1 |
3 |
2.1 |
20 |
14.0 |
Conversion: 1 mi = 1.61 km
Table 57. Accident Type Distribution by Ramp Segment Type for
Rural Diamond On-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.0 0.0 36.6 47.8 0.4 0.0 0.0 0.0 0.0 0.0 - - - |
- - 10 69 - - - - - - 64 0 0 |
- - 7.0 48.3 - - - - - - 44.8 0.0 0.0 |
- - 0 1 - - - - - - 0 0 0 |
- - 0.0 0.7 - - - - - - 0.0 0.0 0.0 |
- - 0 0 - - - - - - 0 0 0 |
- - 0.0 0.0 - - - - - - 0.0 0.0 0.0 |
- - 0 0 - - - - - - 0 0 0 |
- - 0.0 0.0 - - - - - - 0.0 0.0 0.0 |
- - 2 11 - - - - - - 14 0 0 |
- - 1.4 7.7 - - - - - - 9.8 0.0 0.0 |
- - 2 0 - - - - - - 0 0 0 |
- - 1.4 0.0 - - - - - - 0.0 0.0 0.0 |
- - 4 12 - - - - - - 14 0 0 |
- - 2.8 8.4 - - - - - - 9.8 0.0 0.0 |
Total |
84.8 |
143 |
100.0 |
1 |
0.7 |
0 |
0.0 |
0 |
0.0 |
27 |
18.9 |
2 |
1.4 |
30 |
21.0 |
Conversion: 1 mi = 1.61 km
Table 57. Accident Type Distribution by Ramp Segment Type for
Rural Diamond On-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.0 0.0 36.6 0.4 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
- - 10 69 - - - - - - 64 0 0 |
- - 7.0 48.3 - - - - - - 44.8 0.0 0.0 |
- - 0 0 - - - - - - 0 0 - |
- - 0.0 0.0 - - - - - - 0.0 0.0 0.0 |
- - 0 1 - - - - - - 0 0 0 |
- - 0.0 0.7 - - - - - - 0.0 0.0 0.0 |
- - 3 18 - - - - - - 2 0 0 |
- - 2.1 12.6 - - - - - - 1.4 0.0 0.0 |
- - 3 17 - - - - - - 6 0 0 |
- - 2.1 11.9 - -
- - - - 4.2 0.0 0.0 |
- - 0 0 - - - - - - 3 0 0 |
- - 0.0 0.0 - - - - - - 2.1 0.0 0.0 |
- - 0 0 - - - - - - 36 0 0 |
- - 0.0 0.0 - - - - - - 25.2 0.0 0.0 |
- - 0 4 - - - - - - 0 0 0 |
- - 0.0 2.8 - - - - - - 0.0 0.0 0.0 |
- - 6 40 - - - - - - 47 0 0 |
- - 4.2 28.0 - - - - - - 32.9 0.0 0.0 |
Total |
84.8 |
143 |
100.0 |
0 |
0.0 |
1 |
0.7 |
23 |
16.1 |
26 |
18.2 |
3 |
2.1 |
36 |
25.2 |
4 |
2.8 |
93 |
65.0 |
Conversion: 1 mi = 1.61 km
Table 58. Accident Type Distribution
by Ramp Segment Type for
Urban Diamond Off-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
13.7 1.2 32.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
130 43 823 - - - 2 - - - 717 0 0 |
7.6 2.5 47.9 - - - 0.1 - - - 41.7 0.0 0.0 |
0 0 9 - - - 0 - - - 1 0 0 |
0.0 0.0 0.5 - - - 0.0 - - - 0.1 0.0 0.0 |
7 0 23 - - - 0 - - - 2 0 0 |
0.4 0.0 1.3 - - - 0.0 - - - 0.1 0.0 0.0 |
2 0 11 - - - 0 - - - 4 0 0 |
0.1 0.0 0.6 - - - 0.0 - - - 0.2 0.0 0.0 |
9 0 43 - - - 0 - - - 7 0 0 |
0.5 0.0 2.5 - - - 0.0 - - - 0.4 0.0 0.0 |
Total |
47.6 |
1,719 |
100.0 |
10 |
0.6 |
32 |
1.9 |
17 |
1.0 |
59 |
3.4 |
Conversion: 1 mi = 1.61 km
Table 58. Accident Type Distribution by Ramp Segment Type for
Urban Diamond Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
13.7 1.2 32.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
130 43 823 - - - 2 - - - 717 0 0 |
7.5 2.5 47.9 - - - 0.1 - - - 41.7 0.0 0.0 |
0 0 0 - - - 0 - - - 1 0 0 |
0.0 0.0 0.0 - - - 0.0 - - - 0.1 0.0 0.0 |
1 1 5 - - - 0 - - - 2 0 0 |
0.1 0.1 0.3 - - - 0.0 - - - 0.1 0.0 0.0 |
0 0 2 - - - 0 - - - 3 0 0 |
0.0 0.0 0.1 - - - 0.0 - - - 0.2 0.0 0.0 |
15 3 66 - - - 2 - - - 18 0 0 |
0.9 0.2 3.8 - - - 0.1 - - - 1.0 0.0 0.0 |
0 0 4 - - - 0 - - - 0 0 0 |
0.0 0.0 0.2 - - - 0.0 - - - 0.0 0.0 0.0 |
16 4 77 - - - 2 - - - 24 0 0 |
0.9 0.2 4.5 - - - 0.1 - - - 1.4 0.0 0.0 |
Total |
47.6 |
1,719 |
100.0 |
1 |
0.1 |
9 |
0.5 |
5 |
0.3 |
104 |
6.1 |
4 |
0.2 |
123 |
7.2 |
Conversion: 1 mi = 1.61 km
Table 58. Accident Type Distribution by Ramp Segment Type for
Urban Diamond Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
13.7 1.2 32.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
130 43 823 - - - 2 - - - 717 4 0 |
7.6 2.5 47.9 - - - 0.1 - - - 41.7 0.2 0.0 |
0 0 0 - - - 0 - - - 0 0 - |
0.0 0.0 0.0 - - - 0.0 - - - 0.0 0.0 0.0 |
83 0 2 - - - 0 - - - 0 0 0 |
0 0.0 0.1 - - - 0.0 - - - 0.0 0.0 0.0 |
0.0 25 451 - - - 0 - - - 356 3 0 |
4.8 1.5 26.2 - - - 0.0 - - - 20.7 0.2 0.0 |
18 14 196 - - - 0 - - - 57 1 0 |
1.0 0.8 11.4 - - - 0.0 - - - 3.3 0.1 0.0 |
0 0 0 - - - 0 - - - 100 0 0 |
0.0 0.0 0.0 - - - 0.0 - - - 5.8 0.0 0.0 |
0 0 0 - - - 0 - - - 163 0 0 |
0.0 0.0 0.0 - - - 0.0 - - - 9.5 0.0 0.0 |
4 0 54 - - - 0 - - - 10 0 0 |
0.2 0.0 3.1 - - - 0.0 - - - 0.6 0.0 0.0 |
105 39 703 - - - 0 - - - 686 4 0 |
6.1 2.3 40.9 - - - 0.0 - - - 39.9 0.2 0.0 |
Total |
47.6 |
1,719 |
100.0 |
0 |
0.0 |
2 |
0.1 |
918 |
53.4 |
286 |
16.6 |
100 |
5.8 |
163 |
9.5 |
68 |
4.0 |
1,537 |
69.4 |
Conversion: 1 mi = 1.61 km
Table 59. Accident Type Distribution
by Ramp Segment Type for
Urban Parclo Loop Off-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.4 0.0 0.8 0.0 0.0 0.1 0.0 0.0 0.0 0.6 - - - |
7 - 32 - - 0 - - - 11 59 0 0 |
6.4 - 29.4 - - 0.0 - - - 10.1 54.1 0.0 0.0 |
0 - 0 - - 0 - - - 1 1 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.9 0.9 0.0 0.0 |
2 - 2 - - 0 - - - 0 0 0 0 |
1.8 - 1.8 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
1 - 1 - - 0 - - - 0 0 0 0 |
0.9 - 0.9 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
3 0 3 - - 0 - - - 1 1 0 0 |
2.8 - 2.8 - - 0.0 - - - 0.9 0.9 0.0 0.0 |
Total |
1.9 |
109 |
100.0 |
2 |
1.8 |
4 |
3.7 |
2 |
1.8 |
8 |
7.3 |
Conversion: 1 mi = 1.61 km
Table 59. Accident Type Distribution by Ramp Segment Type for
Urban Parclo Loop Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.4 0.0 0.8 0.0 0.0 0.1 0.0 0.0 0.0 0.0 - - - |
7 - 32 - - 0 - - - 11 59 0 0 |
6.4 - 29.4 - - 0.0 - - - 10.1 54.1 0.0 0.0 |
0 - 0 - - 0 - - - 0 0 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
0 - 0 - - 0 - - - 0 0 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
0 - 0 - - 0 - - - 0 0 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
3 - 3 - - 0 - - - 1 1 0 0 |
2.8 - 2.8 - - 0.0 - - - 0.9 0.9 0.0 0.0 |
0 - 0 - - 0 - - - 0 0 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
3 - 3 - - 0 - - - 1 1 0 0 |
2.8 - 2.8 - - 0.0 - - - 0.9 0.9 0.0 0.0 |
Total |
1.9 |
109 |
100.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
8 |
7.3 |
0 |
0.0 |
8 |
7.3 |
Conversion: 1 mi = 1.61 km
Table 59. Accident Type Distribution by Ramp Segment Type for
Urban Parclo Loop Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
0.4 0.0 0.8 0.0 0.0 0.1 0.0 0.0 0.0 0.6 - - - |
7 - 32 - - 0 - - - 11 59 0 0 |
6.4 - 29.4 - - 0.0 - - - 10.1 54.1 0.0 0.0 |
0 - 0 - - 0 - - - 0 0 0 - |
0.0 - 0.0 - - 0.0- - - - 0.0 0.0 0.0 0.0 |
0 - 0 - - 0 - - - - 0 0 0 |
0.0 - 0.0 - - 0.0 - - - 0 0.0 0.0 0.0 |
0 - 22 - - 0 - - - 0.0 37 0 0 |
0.0 - 20.2 - - 0.0 - - - 7 33.9 0.0 0.0 |
0 - 2 - - 0 - - - 6.4 1 0 0 |
0.0 - 1.8 - - 0.0
- - - 2 0.9 0.0 0.0 |
0 - 0 - - 0 - - - 1.8 16 0 0 |
0.0 - 0.0 - - 0.0 - - - 0 14.7 0.0 0.0 |
0 - 0 - - 0 - - - 0 3 0 0 |
0.0 - 0.0 - - 0.0 - - - 0.0 2.8 0.0 0.0 |
1 - 2 - - 0 - - - 0 0 0 0 |
0.9 - 1.8 - - 0.0 - - - 0.0 0.0 0.0 0.0 |
1 - 26 - - 0 - - - 9 57 0 0 |
0.9 - 23.9 - - 0.0 - - - 8.3 52.3 0.0 0.0 |
Total |
1.9 |
109 |
100.0 |
0 |
0.0 |
0 |
0.0 |
66 |
60.6 |
5 |
4.6 |
16 |
14.7 |
3 |
2.8 |
3 |
2.8 |
93 |
85.3 |
Conversion: 1 mi = 1.61 km
Table 60. Accident Type Distribution
by Ramp Segment Type for
Urban Free-Flow Off-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
1.0 0.1 6.8 0.8 0.0 0.2 0.0 0.0 0.0 0.2 - - - |
16 0 124 18 - 11 1 - - 13 0 101 0 |
5.6 0.0 43.7 6.3 - 3.9 0.4 - - 4.6 0.0 35.6 0.0 |
1 0 2 0 - 0 0 - - 0 0 0 0 |
0.4 0.0 0.7 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
3 0 15 0 - 0 1 - - 0 0 0 0 |
1.1 0.0 5.3 0.0 - 0.0 0.4 - - 0.0 0.0 0.0 0.0 |
0 0 2 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.7 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
4 0 19 0 - 0 1 - - 0 0 0 0 |
1.4 0.0 6.7 0.0 - 0.0 0.4 - - 0.0 0.0 0.0 0.0 |
Total |
8.9 |
284 |
100.0 |
3 |
1.1 |
19 |
6.7 |
2 |
0.7 |
24 |
8.5 |
Conversion: 1 mi = 1.61 km
Table 60. Accident Type Distribution by Ramp Segment Type for
Urban Free-Flow Loop Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
1.0 0.1 6.8 0.8 0.0 0.2 0.0 0.0 0.0 0.2 - - - |
16 0 124 18 - 11 1 - - 13 0 101 0 |
5.6 0.0 43.7 6.3 - 3.9 0.4 - - 4.6 0.0 35.6 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 2 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.7 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
10 0 29 1 - 1 0 - - 0 0 3 0 |
3.5 0.0 10.2 0.4 - 0.4 0.0 - - 0.0 0.0 1.1 0.0 |
0 0 1 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.4 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
10 0 32 1 - 1 0 - - 0 0 3 0 |
3.5 0.0 11.3 0.4 - 0.4 0.0 - - 0.0 0.0 1.1 0.0 |
Total |
8.9 |
284 |
100.0 |
0 |
0.0 |
0 |
0.0 |
2 |
0.7 |
45 |
15.8 |
1 |
0.4 |
48 |
16.9 |
Conversion: 1 mi = 1.61 km
Table 60. Accident Type Distribution by Ramp Segment Type for
Urban Free-Flow Loop Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
1.0 0.1 6.8 0.8 0.0 0.0 0.0 0.0 0.0 0.0 - - - |
16 0 124 18 - 11 1 - - 13 0 101 0 |
5.6 0.0 43.7 6.3 - 3.9 0.4 - - 4.6 0.0 35.6 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0- - - 0.0 0.0 0.0 0.0 |
1 0 52 12 - 7 0 - - 10 0 89 0 |
0.4 0.0 18.3 4.2 - 2.5 0.0 - - 3.5 0.0 31.3 0.0 |
1 0 21 5 - 3 0 - - 1 0 8 0 |
0.4 0.0 7.4 1.8 - 1.1
0.0 - - 0.4 0.0 2.8 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 0 0 - 0 0 - - 0 0 0 0 |
0.0 0.0 0.0 0.0 - 0.0 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 0 1 - 0 0 - - 1 0 1 0 |
0.0 0.0 0.0 0.4 - 0.0 0.0 - - 0.4 0.0 0.4 0.0 |
2 0 73 12 - 10 0 - - 12 0 98 0 |
0.7 0.0 25.7 4.2 - 3.5 0.0 - - 4.2 0.0 34.5 0.0 |
Total |
8.9 |
284 |
100.0 |
0 |
0.0 |
0 |
0.0 |
171 |
60.2 |
39 |
13.7 |
0 |
0.0 |
0 |
0.0 |
2 |
0.7 |
212 |
74.6 |
Conversion: 1 mi = 1.61 km
Table 61. Accident Type Distribution
by Ramp Segment Type for
Urban Outer Connection Off-Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.0 0.1 9.9 1.1 0.1 0.0 0.0 0.0 0.0 1.8 - - - |
24 0 334 7 6 - 10 - - 41 131 144 0 |
3.4 0.0 47.9 1.0 0.9 - 1.4 - - 5.9 18.8 20.7 0.0 |
0 0 5 0 0 - 0 - - 0 0 0 0 |
0.0 0.0 0.7 0.0 0.0 - 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 25 0 0 - 2 - - 1 0 1 0 |
0.0 0.0 3.6 0.0 0.0 - 0.3 - - 0.1 0.0 0.1 0.0 |
0 0 3 0 0 - 1 - - 0 1 0 0 |
0.0 0.0 0.4 0.0 0.0 - 0.1 - - 0.0 0.1 0.0 0.0 |
0 0 33 0 0 - 3 - - 1 1 1 0 |
0.0 0.0 4.7 0.0 0.0 - 0.4 - - 0.1 0.1 0.1 0.0 |
Total |
15.9 |
697 |
100.0 |
5 |
0.7 |
29 |
4.2 |
5 |
0.7 |
39 |
5.6 |
Conversion: 1 mi = 1.61 km
Table 61. Accident Type Distribution by Ramp Segment Type for
Urban Connection Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.0 0.1 9.9 1.1 0.1 0.0 0.0 0.0 0.0 1.8 - - - |
24 0 334 7 6 - 10 - - 41 131 144 0 |
3.4 0.0 47.9 1.0 0.9 - 1.4 - - 5.9 18.8 20.7 0.0 |
0 0 1 0 0 - 0 - - 0 0 0 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 4 0 0 - 0 - - 0 0 0 0 |
0.0 0.0 0.6 0.0 0.0 - 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 1 0 0 - 0 - - 0 1 0 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 - - 0.0 0.1 0.0 0.0 |
2 0 55 1 1 - 5 - - 0 2 3 0 |
0.3 0.0 7.9 0.1 0.1 - 0.7 - - 0.0 0.3 0.4 0.0 |
0 0 1 0 0 - 0 - - 0 1 0 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 - - 0.0 0.1 0.0 0.0 |
2 0 62 1 5 - 5 - - 0 4 3 0 |
0.3 0.0 8.9 0.1 0.7 - 0.7 - - 0.0 0.6 0.4 0.0 |
Total |
15.9 |
697 |
100.0 |
1 |
0.1 |
4 |
0.6 |
2 |
0.3 |
69 |
9.9 |
2 |
0.3 |
78 |
11.2 |
Conversion: 1 mi = 1.61 km
Table 61. Accident Type Distribution by Ramp Segment Type for
Outer Connection Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.0 0.1 9.9 1.1 0.1 0.0 0.0 0.0 0.0 1.8 - - - |
241 0 334 7 6 - 10 - - 41 131 144 0 |
3.4 0.0 47.9 1.0 0.9 - 1.4 - - 5.9 18.8 20.7 0.0 |
0 0 1 0 0 - 0 - - 0 0 0 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 - - 0.0 0.0 0.0 0.0 |
0 0 1 0 0 - 0 - - 0 0 1 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 - - 0.0 0.0 0.1 0.0 |
16 0 152 4 4 - 1 - - 23 55 120 0 |
2.3 0.0 21.8 0.6 0.6 - 0.1 - - 3.3 7.9 17.2 0.0 |
5 0 74 2 1 - 1 - - 14 6 19 0 |
0.7 0.0 10.6 0.3 0.1 -
0.1 - - 2.0 0.9 2.7 0.0 |
0 0 0 0 0 - 0 - - 0 13 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 - - 0.0 1.9 0.0 0.0 |
0 0 0 0 0 - 0 - - 0 50 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 - - 0.0 7.2 0.0 0.0 |
1 0 11 0 0 - 0 - - 3 2 0 0 |
0.1 0.0 1.6 0.0 0.0 - 0.0 - - 0.4 0.3 0.0 0.0 |
22 0 239 6 5 - 2 - - 40 126 140 0 |
3.2 0.0 34.3 0.9 0.7 - 0.3 - - 5.7 18.1 20.1 0.0 |
Total |
15.9 |
697 |
100.0 |
1 |
0.1 |
2 |
0.3 |
375 |
53.8 |
122 |
17.5 |
13 |
1.9 |
50 |
7.2 |
17 |
2.4 |
580 |
83.2 |
Conversion: 1 mi = 1.61 km
Table 62. Accident Type Distribution
by Ramp Segment Type for
Urban Direct and Semi-Direct Connection Ramps (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.5 1.4 16.5 7.6 2.4 0.2 1.3 1.9 0.0 0.0 - - - |
29 9 305 71 21 2 41 33 1 - 5 30 0 |
5.3 1.6 55.8 13.0 3.8 0.4 7.5 6.0 0.2 - 0.9 5.5 0.0 |
0 0 11 1 0 0 0 3 0 - 0 0 0 |
0.0 0.0 2.0 0.2 0.0 0.0 0.0 0.5 0.0 - 0.0 0.0 0.0 |
2 0 43 2 0 0 6 5 1 - 0 0 0 |
0.4 0.0 7.9 0.4 0.0 0.0 1.1 0.9 0.2 - 0.0 0.0 0.0 |
2 0 3 0 0 0 0 0 0 - 0 0 0 |
0.4 0.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 |
4 0 57 3 0 0 0 8 1 - 0 0 0 |
0.7 0.0 10.4 0.5 0.0 0.0 0.0 1.5 0.2 - 0.0 0.0 0.0 |
Total |
34.7 |
547 |
100.0 |
15 |
2.7 |
59 |
10.8 |
5 |
0.9 |
79 |
14.4 |
Conversion: 1 mi = 1.61 km
Table 62. Accident Type Distribution by Ramp Segment Type for
Urban Direct and Semi-Direct Connection Off-Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.5 1.4 16.5 7.6 2.4 0.2 1.3 1.9 0.0 0.0 - - - |
29 9 305 71 21 2 41 33 1 - 5 30 0 |
5.3 1.6 55.8 13.0 3.8 0.4 7.5 6.0 0.2 - 0.9 5.5 0.0 |
0 0 1 0 0 0 0 0 0 - 0 0 0 |
0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 0 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 0 0 0 0 - 0 1 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.2 0.0 |
9 1 137 8 8 0 23 12 0 - 1 2 0 |
1.6 0.2 25.0 1.5 1.5 0.0 4.2 2.2 0.0 - 0.2 0.4 0.0 |
0 0 2 1 0 0 0 1 0 - 0 0 0 |
0.0 0.0 0.4 0.2 0.0 0.0 0.0 0.2 0.0 - 0.0 0.0 0.0 |
9 1 140 9 8 0 24 13 0 - 1 3 0 |
1.6 0.2 25.6 1.6 1.5 0.0 2.4 2.4 0.0 - 0.2 0.5 0.0 |
Total |
34.7 |
547 |
100.0 |
2 |
0.4 |
0 |
0.0 |
1 |
0.2 |
201 |
36.7 |
4 |
0.7 |
208 |
38.0 |
Conversion: 1 mi = 1.61 km
Table 62. Accident Type Distribution by Ramp Segment Type for
Urban Direct and Semi-Direct Connection Ramps (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.5 1.4 16.5 7.6 2.4 0.2 1.3 1.9 0.0 0.0 - - - |
29 9 305 71 21 2 41 33 1 - 5 30 0 |
5.3 1.6 55.8 13.0 3.8 0.4 7.5 6.0 0.2 - 0.9 5.5 0.0 |
0 0 0 0 0 0 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 0 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 .0 - 0.0 0.0 0.0 |
6 4 66 38 7 1 10 8 0 - 2 20 0 |
1.1 0.7 12.1 6.9 1.3 0.2 1.8 1.5 0.0 - 0.4 3.7 0.0 |
9 3 39 21 5 1 1 3 0 - 1 6 0 |
1.6 0.5 7.1 3.8 0.9 0.2
0.2 0.5 0.0 - 0.2 1.1 0.0 |
0 0 0 0 0 0 0 0 0 - 1 0 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.2 0.0 0.0 |
0 0 0 0 0 0 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 |
1 1 3 0 1 0 0 1 0 - 0 1 0 |
0.2 0.2 0.5 0.0 0.2 0.0 0.0 0.2 0.0 - 0.0 0.2 0.0 |
16 8 108 59 13 2 11 12 0 - 4 27 0 |
2.9 1.5 19.7 10.8 2.4 0.4 2.0 2.2 0.0 - 0.7 4.9 0.0 |
Total |
34.7 |
547 |
100.0 |
0 |
0.0 |
0 |
0.0 |
162 |
29.6 |
89 |
16.3 |
1 |
0.2 |
0 |
0.0 |
8 |
1.5 |
260 |
47.5 |
Conversion: 1 mi = 1.61 km
Table 63. Accident Type Distribution
by Ramp Segment Type for
Urban C/D Roads (1993 Through 1995)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Ran off road |
Overturned |
Other |
Total |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Frequency |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.4 1.1 10.9 7.9 1.7 0.0 3.0 2.0 3.3 0.0 - - - |
14 6 558 30 9 - 147 0 131 - 0 0 0 |
1.6 0.7 62.3 3.4 1.0 - 16.4 0.0 14.6 - 0.0 0.0 0.0 |
0 0 1 0 0 - 0 0 2 - 0 0 0 |
0.0 0.0 0.1 0.0 0.0 - 0.0 0.0 0.2 - 0.0 0.0 0.0 |
0 0 19 2 1 - 4 0 2 - 0 0 0 |
0.0 0.0 2.1 0.2 0.1 - 0.4 0.0 0.2 - 0.0 0.0 0.0 |
1 0 9 0 0 - 2 0 1 - 0 0 0 |
0.1 0.0 1.0 0.0 0.0 - 0.2 0.0 0.1 - 0.0 0.0 0.0 |
1 0 29 2 1 - 6 0 5 - 0 0 0 |
0.1 0.0 3.2 0.2 0.1 - 0.7 0.0 0.6 - 0.0 0.0 0.0 |
Total |
33.3 |
895 |
100.0 |
3 |
0.3 |
28 |
3.1 |
13 |
1.5 |
44 |
4.9 |
Conversion: 1 mi = 1.61 km
Table 63. Accident Type Distribution by Ramp Segment Type for
Urban C/D Roads(1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Parked vehicle |
Pedestrian |
Bicycle |
Fixed object |
Other collision |
Total |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Fq. |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.4 1.1 10.9 7.9 1.7 0.0 3.0 2.0 3.3 0.0 - - - |
14 6 558 30 9 - 147 0 131 - 0 0 0 |
1.6 0.7 62.3 3.4 1.0 - 16.4 0.0 14.6 - 0.0 0.0 0.0 |
0 0 0 0 0 - 1 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.1 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 - 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 - 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
7 2 61 5 0 - 19 0 35 - 0 0 0 |
0.8 0.2 6.8 0.6 0.0 - 2.1 0.0 3.9 - 0.0 0.0 0.0 |
0 0 3 0 0 - 1 0 1 - 0 0 0 |
0.0 0.0 0.3 0.0 0.0 - 0.1 0.0 0.1 - 0.0 0.0 0.0 |
7 2 64 5 0 - 21 0 36 - 0 0 0 |
0.8 0.2 7.2 0.6 0.0 - 2.3 0.0 4.0 - 0.0 0.0 0.0 |
Total |
33.3 |
895 |
100.0 |
1 |
0.1 |
0 |
0.0 |
0 |
0.0 |
129 |
14.4 |
5 |
0.6 |
135 |
15.1 |
Conversion: 1 mi = 1.61 km
Table 63. Accident Type Distribution by Ramp Segment Type for
Urban C/D Roads (1993 Through 1995)(Continued)
Ramp segment type |
Total length (mi) |
Total accidents |
Number and percentage of accidents by severity level |
Head-on |
Sideswipe |
Rear-end |
Angle |
Left turn |
Right turn |
Other collision |
Total |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
F |
(%) |
Normal deceleration lane
Deceleration lane with mainline lane drop
Ramp proper
Normal acceleration lane
Accleration lane with mainline lane addition
Mainline weaving area
Diverge area on ramp
Merge area on ramp
Weaving area on ramp
Two-way roadway on ramp
Cross-road ramp terminal
(stop condition)
Cross-road ramp terminal
(free-flow)
Frontage road connection |
3.4 1.1 10.9 7.9 1.7 0.0 3.0 2.0 3.3 0.0 - - - |
14 6 558 30 9 - 147 0 131 - 0 0 0 |
1.6 0.7 62.3 3.4 1.0 - 16.4 0.0 14.6 - 0.0 0.0 0.0 |
0 0 1 0 0 - 0 0 0 - 0 0 - |
0.0 0.0 0.1 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
4 0 1 0 0 - 1 0 0 - 0 0 0 |
0.4 0.0 0.1 0.0 0.0 - 0.1 0.0 0.0 - 0.0 0.0 0.0 |
2 3 381 17 5 - 89 0 62 - 0 0 0 |
0.2 0.3 42.6 1.9 0.6 - 9.9 0.0 6.9 - 0.0 0.0 0.0 |
0 1 77 6 3 - 30 0 28 - 0 0 0 |
0.0 0.1 8.6 0.7 0.3 -
3.4 0.0 3.1 - 0.0 0.0 0.0 |
0 0 0 0 0 - 0 0 0 - 0 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 0 0 0 - 0 0 0 - . 0 0 |
0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
0 0 5 0 0 - 0 0 0 - 0 0 0 |
0.0 0.0 0.6 0.0 0.0 - 0.0 0.0 0.0 - 0.0 0.0 0.0 |
6 4 465 23 8 - 120 0 90 - 0 0 0 |
0.7 0.4 52.0 2.6 0.9 - 13.4 0.0 10.1 - 0.0 0.0 0.0 |
Total |
33.3 |
895 |
100.0 |
1 |
0.1 |
2 |
0.2 |
561 |
62.7 |
147 |
16.4 |
0 |
0.0 |
0 |
0.0 |
5 |
0.6 |
716 |
80.0 |
Conversion: 1 mi = 1.61 km
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