Safety Evaluation of Signalized Restricted Crossing U-Turn Intersections
Appendix. Analysis of Other Crash Variables
Table 17 through table 27 provide more information on the crash variables from the RCUT test sites.
Table 17. Other crash variables at Alabama-Plum site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period P percent of Total Crashes |
| Right front angle crash |
9 |
5.4 |
3 |
7.5 |
| Left front angle crash |
1 |
0.6 |
1 |
2.5 |
| Head-on center crash |
9 |
5.4 |
5 |
12.5 |
| Undercarriage crash |
1 |
0.6 |
0 |
0.0 |
| Broadside right crash |
5 |
3.0 |
1 |
2.5 |
| Right rear angle crash |
115 |
68.5 |
1 |
2.5 |
| Rear-end center crash |
5 |
3.0 |
21 |
52.5 |
| Left rear angle crash |
1 |
0.6 |
0 |
0.0 |
| Broadside left crash |
1 |
0.6 |
0 |
0.0 |
| No second vehicle crash |
10 |
6.0 |
1 |
2.5 |
| No applicable crash type |
10 |
6.0 |
7 |
17.5 |
| Missing crash type |
1 |
0.6 |
0 |
0.0 |
| Daylight |
125 |
74.4 |
24 |
60.0 |
| Dark |
39 |
23.2 |
13 |
32.5 |
| Dusk |
4 |
2.4 |
2 |
5.0 |
| Dawn |
0 |
0.0 |
1 |
2.5 |
| Clear weather |
93 |
55.4 |
27 |
67.5 |
| Cloudy weather |
40 |
23.8 |
10 |
25.0 |
| Foggy weather |
1 |
0.6 |
0 |
0.0 |
| Rainy weather |
34 |
20.2 |
3 |
7.5 |
| Dry road condition |
118 |
70.2 |
33 |
82.5 |
| Wet road condition |
50 |
29.8 |
4 |
10.0 |
| Unknown road condition |
0 |
0.0 |
2 |
5.0 |
| Water buildup on road |
0 |
0.0 |
1 |
2.5 |
Table 18. Other crash variables at Alabama-Retail site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Right front angle crash |
1 |
2.3 |
0 |
0.0 |
| Left front angle crash |
0 |
0.0 |
1 |
33.3 |
| Head-on center crash |
4 |
9.1 |
0 |
0.0 |
| Undercarriage crash |
2 |
4.6 |
0 |
0.0 |
| Broadside right crash |
0 |
0.0 |
0 |
0.0 |
| Right rear angle crash |
26 |
59.1 |
0 |
0.0 |
| Rear-end center crash |
1 |
2.3 |
2 |
66.7 |
| Left rear angle crash |
1 |
2.3 |
0 |
0.0 |
| Broadside left crash |
1 |
2.3 |
0 |
0.0 |
| No second vehicle crash |
0 |
0.0 |
0 |
0.0 |
| No applicable crash type |
6 |
13.6 |
0 |
0.0 |
| Missing crash type |
2 |
4.6 |
0 |
0.0 |
| Daylight |
34 |
77.3 |
2 |
66.7 |
| Dusk |
3 |
6.8 |
0 |
0.0 |
| Dark, roadway lighted |
1 |
2.3 |
0 |
0.0 |
| Dark, roadway not lighted |
6 |
13.6 |
1 |
33.3 |
| Clear weather |
27 |
74.4 |
2 |
66.7 |
| Cloudy weather |
7 |
2.4 |
0 |
0.0 |
| Foggy weather |
0 |
5.4 |
0 |
0.0 |
| Rainy weather |
10 |
17.9 |
1 |
33.3 |
| Dry road condition |
33 |
75.0 |
2 |
66.7 |
| Wet road condition |
11 |
25.0 |
1 |
33.3 |
Table 19. Other crash variables at North Carolina site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle crash |
4 |
2.0 |
2 |
1.3 |
| Animal crash |
1 |
0.5 |
4 |
2.5 |
| Backing-up crash |
1 |
0.5 |
1 |
0.6 |
| Fixed object crash |
2 |
1.0 |
4 |
2.5 |
| Left-turn, different roadways crash |
4 |
2.0 |
5 |
3.1 |
| Left-turn, same roadway crash |
58 |
29.0 |
17 |
10.7 |
| Movable object crash |
1 |
0.5 |
2 |
1.3 |
| Parked crash |
0 |
0.0 |
1 |
0.6 |
| Other crash with vehicle |
1 |
0.5 |
0 |
0.0 |
| Pedalcyclist crash |
1 |
0.5 |
0 |
0.0 |
| Ran off road, right crash |
1 |
0.5 |
0 |
0.0 |
| Rear-end crash |
102 |
51.0 |
82 |
51.6 |
| Right-turn, different roadways crash |
12 |
6.0 |
22 |
13.8 |
| Right-turn, same roadway crash |
1 |
0.5 |
2 |
1.3 |
| Sideswipe, opposite direction crash |
1 |
0.5 |
1 |
0.6 |
| Sideswipe, same direction crash |
10 |
5.0 |
16 |
10.1 |
| Daylight |
139 |
69.5 |
112 |
70.4 |
| Dawn |
18 |
9.0 |
16 |
10.1 |
| Dusk |
43 |
21.5 |
31 |
19.5 |
| Clear weather |
194 |
97.0 |
156 |
98.1 |
| Foggy weather |
3 |
1.5 |
2 |
1.3 |
| Rainy weather |
3 |
1.5 |
1 |
0.6 |
| Dry road condition |
165 |
82.5 |
129 |
81.1 |
| Wet road condition |
34 |
17.0 |
30 |
18.9 |
| Icy road condition |
1 |
0.5 |
0 |
0.00 |
Table 20. Other crash variables at Ohio-Symmes site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle crash |
10 |
13.3 |
7 |
10.0 |
| Backing-up crash |
1 |
1.3 |
1 |
1.4 |
| Fixed object crash |
0 |
0.0 |
7 |
10.0 |
| Head-on crash |
1 |
0.9 |
1 |
1.4 |
| Left-turn crash |
19 |
16.8 |
6 |
8.6 |
| Parked vehicle crash |
1 |
0.9 |
0 |
0.0 |
| Other noncrash |
0 |
0.0 |
2 |
2.9 |
| Pedestrian crash |
0 |
0.0 |
1 |
1.4 |
| Rear-end crash |
75 |
66.4 |
41 |
58.6 |
| Sideswipe, meeting crash |
2 |
1.8 |
0 |
0.0 |
| Sideswipe, passing crash |
4 |
3.5 |
4 |
5.7 |
| Dark, lighted |
26 |
23.0 |
11 |
15.7 |
| Dark, no light |
7 |
6.2 |
2 |
2.9 |
| Dawn |
2 |
1.8 |
2 |
2.9 |
| Daylight |
75 |
66.4 |
50 |
71.4 |
| Dusk |
2 |
1.8 |
1 |
1.4 |
| Light not stated |
1 |
0.9 |
4 |
5.7 |
| No adverse weather condition |
87 |
77.0 |
51 |
72.9 |
| Rain |
26 |
23.0 |
15 |
21.4 |
| Other weather |
0 |
0.0 |
2 |
2.9 |
| Snow |
0 |
0.0 |
2 |
2.9 |
| Dry road condition |
74 |
65.5 |
36 |
51.4 |
| Snow road condition |
1 |
0.9 |
2 |
2.9 |
| Wet road condition |
37 |
32.7 |
32 |
45.7 |
| Road condition not stated |
1 |
0.9 |
0 |
0.0 |
| Compact causal vehicle |
18 |
15.9 |
8 |
11.4 |
| Full-size causal vehicle |
10 |
8.8 |
16 |
22.9 |
| Mid-size causal vehicle |
35 |
31.0 |
18 |
25.7 |
| Other vehicle |
25 |
22.1 |
18 |
25.7 |
| Pickup causal vehicle |
17 |
15.0 |
8 |
11.4 |
| School bus causal vehicle |
1 |
0.9 |
0 |
0.0 |
| Straight truck causal vehicle |
2 |
1.8 |
1 |
1.4 |
| Subcompact causal vehicle |
1 |
0.9 |
0 |
0.0 |
| Tractor semitrailer causal vehicle |
2 |
1.8 |
1 |
1.4 |
| Vehicle not stated |
2 |
1.8 |
0 |
0.0 |
Table 21. Other crash variables at Ohio-Tylersville site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle crash |
16 |
15.4 |
1 |
4.2 |
| Backing-up crash |
3 |
2.9 |
0 |
0.0 |
| Fixed object crash |
5 |
4.8 |
1 |
4.2 |
| Head-on crash |
0 |
0.0 |
0 |
0.0 |
| Left-turn crash |
6 |
5.8 |
1 |
4.2 |
| Other non-collision |
1 |
1.0 |
0 |
0.0 |
| Rear-end crash |
66 |
63.5 |
14 |
58.3 |
| Sideswipe, meeting crash |
1 |
1.0 |
0 |
0.0 |
| Overturning crash |
1 |
1.0 |
0 |
0.0 |
| Sideswipe, passing crash |
5 |
4.8 |
7 |
29.2 |
| Dark, lighted |
19 |
18.3 |
4 |
16.7 |
| Dark, no light |
7 |
6.7 |
1 |
4.2 |
| Dawn |
5 |
4.8 |
1 |
4.2 |
| Daylight |
71 |
68.3 |
18 |
75.0 |
| Dusk |
2 |
1.9 |
0 |
0.0 |
| No adverse weather condition |
82 |
78.8 |
21 |
87.5 |
| Rain |
18 |
17.3 |
2 |
8.3 |
| Other weather condition |
0 |
0.0 |
1 |
4.2 |
| Snow |
3 |
2.9 |
0 |
0.0 |
| Fog |
1 |
1.0 |
0 |
0.0 |
| Dry |
75 |
72.1 |
21 |
87.5 |
| Snow |
1 |
1.0 |
0 |
0.0 |
| Wet |
27 |
26.0 |
3 |
12.5 |
| Ice |
1 |
1.0 |
0 |
0.0 |
| Compact causal vehicle |
14 |
13.5 |
3 |
12.5 |
| Full-size causal vehicle |
14 |
13.5 |
3 |
12.5 |
| Mid-size causal vehicle |
30 |
28.8 |
9 |
37.5 |
| Motorcycle causal vehicle |
1 |
1.0 |
0 |
0.0 |
| Panel truck causal vehicle |
5 |
4.8 |
0 |
0.0 |
| Other causal vehicle |
22 |
21.2 |
6 |
25.0 |
| Pickup causal vehicle |
13 |
12.5 |
3 |
12.5 |
| School bus causal vehicle |
1 |
1.0 |
0 |
0.0 |
| Straight truck causal vehicle |
1 |
1.0 |
0 |
0.0 |
| Subcompact causal vehicle |
1 |
1.0 |
0 |
0.0 |
| Tractor semitrailer causal vehicle |
1 |
1.0 |
0 |
0.0 |
| Causal vehicle not stated |
1 |
1.0 |
0 |
0.0 |
Table 22. Other crash variables at Ohio-Hamilton-Mason site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle crash |
8 |
10.0 |
0 |
0.0 |
| Backing-up crash |
2 |
2.5 |
0 |
0.0 |
| Fixed object crash |
4 |
5.0 |
0 |
0.0 |
| Left-turn crash |
2 |
2.5 |
0 |
0.0 |
| Other noncrash |
0 |
0.0 |
1 |
11.1 |
| Rear-end crash |
61 |
76.3 |
7 |
77.8 |
| Sideswipe, passing |
3 |
3.8 |
1 |
11.1 |
| Dark, lighted |
6 |
7.5 |
0 |
0.0 |
| Dark, no light |
8 |
10.0 |
2 |
22.2 |
| Dawn |
3 |
3.8 |
1 |
11.1 |
| Daylight |
62 |
77.5 |
6 |
66.7 |
| Dusk |
1 |
1.3 |
0 |
0.0 |
| No adverse weather condition |
64 |
80.0 |
8 |
88.9 |
| Rain |
10 |
12.5 |
1 |
11.1 |
| Snow |
6 |
7.5 |
0 |
0.0 |
| Dry road condition |
60 |
75.0 |
7 |
77.8 |
| Snow road condition |
4 |
5.0 |
0 |
0.0 |
| Wet road condition |
15 |
18.8 |
2 |
22.2 |
| Ice road condition |
1 |
1.3 |
0 |
0.0 |
| Compact causal vehicle |
16 |
20.0 |
3 |
33.3 |
| Full-size causal vehicle |
6 |
7.5 |
0 |
0.0 |
| Mid-size causal vehicle |
23 |
28.8 |
3 |
33.3 |
| Panel truck causal vehicle |
2 |
2.5 |
0 |
0.0 |
| Other causal vehicle |
17 |
21.3 |
3 |
33.3 |
| Pickup truck causal vehicle |
13 |
16.3 |
0 |
0.0 |
| Straight truck causal vehicle |
1 |
1.3 |
0 |
0.0 |
| Subcompact causal vehicle |
2 |
2.5 |
0 |
0.0 |
Table 23. Other crash variables at Texas-Evans site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle, both going straight crash |
25 |
24.3 |
64 |
19.7 |
| Opposite direction, both going straight crash |
0 |
0.0 |
1 |
0.3 |
| Od, one straight, one left-turn crash |
9 |
8.7 |
21 |
6.5 |
| One mv other crash |
1 |
1.0 |
0 |
0.0 |
| One mv going straight crash |
4 |
3.9 |
22 |
6.8 |
| One mv turning left crash |
1 |
1.0 |
3 |
0.9 |
| One mv turning right crash |
1 |
1.0 |
1 |
0.3 |
| Sd, both going straight, rear-end crash |
12 |
11.7 |
74 |
22.8 |
| Sd, both going straight, sideswipe crash |
9 |
8.7 |
22 |
6.8 |
| Sd, both left-turn crash |
0 |
0.0 |
3 |
0.9 |
| Sd, both right-turn crash |
2 |
1.9 |
7 |
2.2 |
| Sd, one straight, one left-turn crash |
1 |
1.0 |
1 |
0.3 |
| Sd, one straight, one right-turn crash |
1 |
1.0 |
1 |
0.3 |
| Sd, one straight, one stopped crash |
37 |
35.9 |
105 |
32.3 |
| Dark, lighted |
20 |
19.4 |
70 |
21.5 |
| Dark, no light |
16 |
15.5 |
16 |
4.9 |
| Dawn |
0 |
0.0 |
3 |
0.9 |
| Daylight |
64 |
62.1 |
235 |
72.3 |
| Dusk |
0 |
0.0 |
1 |
0.3 |
| Dark, unknown lighting |
3 |
2.9 |
0 |
0.0 |
| Clear/cloudy weather |
91 |
88.3 |
297 |
91.4 |
| No weather data |
2 |
1.9 |
0 |
0.0 |
| Rain |
10 |
9.7 |
26 |
8.0 |
| Fog |
0 |
0.0 |
2 |
0.6 |
| Dry road condition |
83 |
80.6 |
291 |
89.5 |
| Wet road condition |
18 |
17.5 |
34 |
10.5 |
| No road condition data |
2 |
1.9 |
0 |
0.0 |
Od = opposite direction; mv = motor vehicle; Sd = same direction.
Table 24. Other crash variables at Texas-Stone Oak site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle, both going straight crash |
5 |
11.9 |
21 |
12.4 |
| Od, both going straight crash |
0 |
0.0 |
1 |
0.6 |
| Od, one straight, one left-turn crash |
4 |
9.5 |
6 |
3.6 |
| One mv other crash |
1 |
2.4 |
0 |
0.0 |
| One mv going straight crash |
6 |
14.3 |
26 |
15.4 |
| One mv turning left crash |
0 |
0.0 |
1 |
0.6 |
| One mv turning right crash |
0 |
0.0 |
2 |
1.2 |
| Sd, both going straight, rear-end crash |
8 |
19.0 |
44 |
26.0 |
| Sd, both going straight, sideswipe crash |
5 |
11.9 |
12 |
7.1 |
| Sd, one straight, one left-turn crash |
0 |
0.0 |
1 |
0.6 |
| Sd, one straight, one right-turn crash |
0 |
0.0 |
1 |
0.6 |
| Sd, one straight, one stopped crash |
13 |
31.0 |
54 |
32.0 |
| Dark, lighted |
11 |
26.2 |
46 |
27.2 |
| Dark, no light |
2 |
4.8 |
12 |
7.1 |
| Dawn |
1 |
2.4 |
4 |
2.4 |
| Daylight |
25 |
59.5 |
105 |
62.1 |
| Dusk |
0 |
0.0 |
2 |
1.2 |
| Dark, unknown lighting |
1 |
2.4 |
0 |
0.0 |
| Unknown lighting |
2 |
4.8 |
0 |
0.0 |
| Clear and cloudy weather |
37 |
88.1 |
116 |
68.6 |
| Unknown weather |
1 |
2.4 |
33 |
19.5 |
| Rain |
4 |
9.5 |
18 |
10.7 |
| Fog |
0 |
0.0 |
2 |
1.2 |
| Dry road condition |
33 |
78.6 |
142 |
84.0 |
| Wet road condition |
8 |
19.0 |
27 |
16.0 |
| No road condition data |
1 |
2.4 |
0 |
0.0 |
Od = opposite direction; mv = motor vehicle; Sd = same direction.
Table 25. Other crash variables at Texas-New Guibeau site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle, both going straight crash |
4 |
3.9 |
6 |
9.7 |
| Od, both going straight crash |
0 |
0.0 |
1 |
1.6 |
| Od, one straight, one left-turn crash |
5 |
4.9 |
1 |
1.6 |
| One mv going straight crash |
7 |
6.8 |
5 |
8.1 |
| One mv turning right crash |
1 |
1.0 |
0 |
0.0 |
| Sd, both going straight, rear-end crash |
22 |
21.4 |
14 |
22.6 |
| Sd, both going straight, sideswipe crash |
3 |
2.9 |
10 |
16.1 |
| Sd, both left-turn crash |
1 |
1.0 |
1 |
1.6 |
| Sd, both right-turn crash |
1 |
1.0 |
0 |
0.0 |
| Sd, one straight, one stopped crash |
59 |
57.3 |
24 |
38.7 |
| Dark, lighted |
24 |
23.3 |
10 |
16.1 |
| Dark, no light |
6 |
5.8 |
5 |
8.1 |
| Daylight |
71 |
68.9 |
43 |
69.4 |
| Dusk |
0 |
0.0 |
1 |
1.6 |
| Dark, unknown lighting |
2 |
1.9 |
3 |
4.8 |
| Clear and cloudy weather |
90 |
87.4 |
56 |
90.3 |
| Unknown weather |
4 |
3.9 |
1 |
1.6 |
| Rain |
8 |
7.8 |
4 |
6.5 |
| Fog |
1 |
1.0 |
1 |
1.6 |
| Dry road condition |
84 |
81.6 |
54 |
87.1 |
| Wet road condition |
15 |
14.6 |
7 |
11.3 |
| No road condition data |
4 |
3.9 |
1 |
1.6 |
Od = opposite direction; mv = motor vehicle; Sd = same direction.
Table 26. Other crash variables at Texas-Shaenfield site.
| Variable Level |
Before-Period
Number of Crashes |
Before-Period
Percent of Total Crashes |
After-Period
Number of Crashes |
After-Period
Percent of Total Crashes |
| Angle, both going straight crash |
9 |
11.1 |
13 |
15.9 |
| Od, one straight, one left-turn crash |
1 |
1.2 |
0 |
0.0 |
| One mv going straight crash |
6 |
7.4 |
7 |
8.5 |
| One mv turning left crash |
0 |
0.0 |
1 |
1.2 |
| One mv turning right crash |
0 |
0.0 |
1 |
1.2 |
| Sd, both going straight, rear-end crash |
13 |
16.0 |
20 |
24.4 |
| Sd, both going straight, sideswipe crash |
2 |
2.5 |
16 |
19.5 |
| Sd, both left-turn crash |
0 |
0.0 |
2 |
2.4 |
| Sd, one straight, one left-turn crash |
0 |
0.0 |
1 |
1.2 |
| Sd, one right, one stopped crash |
1 |
1.2 |
1 |
1.2 |
| Sd, one straight, one stopped crash |
49 |
60.5 |
20 |
24.4 |
| Dark, lighted |
11 |
13.6 |
24 |
29.3 |
| Dark, no light |
7 |
8.6 |
3 |
3.7 |
| Dawn |
1 |
1.2 |
1 |
1.2 |
| Daylight |
59 |
72.8 |
53 |
64.6 |
| Dark, unknown lighting |
3 |
3.7 |
1 |
1.2 |
| Clear and cloudy weather |
71 |
87.6 |
76 |
92.7 |
| Rain |
9 |
11.1 |
5 |
6.1 |
| Fog |
0 |
0.0 |
1 |
1.2 |
| No weather data |
1 |
1.2 |
0 |
0.0 |
| Dry road condition |
70 |
86.4 |
72 |
87.8 |
| Wet road condition |
10 |
12.3 |
10 |
12.2 |
| No road condition data |
1 |
1.2 |
0 |
0.0 |
Od = opposite direction; mv = motor vehicle; Sd = same direction.
Table 27. Other crash variables at Texas-71 site.
| Variable Level |
Before-Period Number of Crashes |
Before-Period Percent of Total Crashes |
After-Period Number of Crashes |
After-Period Percent of Total Crashes |
| Angle, both going straight crash |
45 |
28.8 |
2 |
12.5 |
| Od, both going straight crash |
1 |
0.6 |
0 |
0.0 |
| Od, one straight, one left-turn crash |
14 |
9.0 |
0 |
0.0 |
| One mv going straight crash |
19 |
12.2 |
2 |
12.5 |
| One mv turning left crash |
4 |
2.6 |
0 |
0.0 |
| One mv turning right crash |
1 |
0.6 |
1 |
6.2 |
| Sd, both going straight, rear-end crash |
21 |
13.5 |
4 |
25.0 |
| Sd, both going straight, sideswipe crash |
8 |
5.1 |
3 |
18.8 |
| Sd, one straight, one left-turn crash |
0 |
0.0 |
1 |
6.2 |
| Sd, one straight, one right-turn crash |
2 |
1.3 |
0 |
0.0 |
| Sd, one straight, one stopped crash |
41 |
26.3 |
3 |
18.8 |
| Dark, lighted |
22 |
14.1 |
4 |
25.0 |
| Dark, no light |
20 |
12.8 |
4 |
25.0 |
| Dawn |
4 |
2.6 |
0 |
0.0 |
| Daylight |
104 |
66.7 |
6 |
37.5 |
| Dusk |
3 |
1.9 |
0 |
0.0 |
| Dark, unknown lighting |
3 |
1.9 |
2 |
12.5 |
| Clear and cloudy weather |
140 |
89.7 |
11 |
68.8 |
| Unknown weather |
1 |
0.6 |
0 |
0.0 |
| Rain |
15 |
9.6 |
4 |
25.0 |
| Fog |
|
|
1 |
6.2 |
| Dry road condition |
136 |
87.2 |
11 |
68.8 |
| Sand, mud, dirt road condition |
1 |
0.6 |
0 |
0.0 |
| Wet road condition |
18 |
11.5 |
5 |
31.2 |
| No road condition data |
1 |
0.6 |
0 |
0.0 |
Od = opposite direction; mv = motor vehicle; Sd = same direction.
