 |
|
Distance to Stop Chart
Typical coefficients of friction:
Wet, packed snow (0.30-0.60), Dry, travelled asphalt (0.55-0.80), Dry,
loose gravel (0.40-0.70)
Source: Northwestern University Traffic
Institute, Traffic Accident Reconstruction, Volume 2, page 62-14
|
|
Friction Coefficient |
|
0.10 |
0.15 |
0.20 |
0.25 |
0.30 |
0.35 |
0.40 |
0.45 |
0.50 |
0.55 |
0.60 |
0.65 |
0.70 |
0.75 |
0.80 |
0.85 |
0.90 |
|
Speed
|
5 |
8 |
6 |
4 |
3 |
3 |
2 |
2 |
2 |
2 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
10 |
33 |
22 |
17 |
13 |
11 |
10 |
8 |
7 |
7 |
6 |
6 |
5 |
5 |
4 |
4 |
4 |
4 |
|
15 |
75 |
50 |
38 |
30 |
25 |
21 |
19 |
17 |
15 |
14 |
13 |
12 |
11 |
10 |
9 |
9 |
8 |
|
20 |
133 |
89 |
67 |
53 |
44 |
38 |
33 |
30 |
27 |
24 |
22 |
21 |
19 |
18 |
17 |
16 |
15 |
|
25 |
208 |
139 |
104 |
83 |
69 |
60 |
52 |
46 |
42 |
38 |
35 |
32 |
30 |
28 |
26 |
25 |
23 |
|
30 |
300 |
200 |
150 |
120 |
100 |
86 |
75 |
67 |
60 |
55 |
50 |
46 |
43 |
40 |
38 |
35 |
33 |
|
35 |
408 |
272 |
204 |
163 |
136 |
117 |
102 |
91 |
82 |
74 |
68 |
63 |
58 |
54 |
51 |
48 |
45 |
|
40 |
533 |
356 |
267 |
213 |
178 |
152 |
133 |
119 |
107 |
97 |
89 |
82 |
76 |
71 |
67 |
63 |
59 |
|
45 |
675 |
450 |
338 |
270 |
225 |
193 |
169 |
150 |
135 |
123 |
113 |
104 |
96 |
90 |
84 |
79 |
75 |
|
50 |
833 |
556 |
417 |
333 |
278 |
238 |
208 |
185 |
167 |
152 |
139 |
128 |
119 |
111 |
104 |
98 |
93 |
|
55 |
1008 |
672 |
504 |
403 |
336 |
288 |
252 |
224 |
202 |
183 |
168 |
155 |
144 |
134 |
126 |
119 |
112 |
|
60 |
1200 |
800 |
600 |
480 |
400 |
343 |
300 |
267 |
240 |
218 |
200 |
185 |
171 |
160 |
150 |
141 |
133 |
|
65 |
1408 |
939 |
704 |
563 |
469 |
402 |
352 |
313 |
282 |
256 |
235 |
217 |
201 |
188 |
176 |
166 |
156 |
|
70 |
1633 |
1089 |
817 |
653 |
544 |
467 |
408 |
363 |
327 |
297 |
272 |
251 |
233 |
218 |
204 |
192 |
181 |
|
75 |
1875 |
1250 |
938 |
750 |
625 |
536 |
469 |
417 |
375 |
341 |
313 |
288 |
268 |
250 |
234 |
221 |
208 |
|
80 |
2133 |
1422 |
1067 |
853 |
711 |
610 |
533 |
474 |
427 |
388 |
356 |
328 |
305 |
284 |
267 |
251 |
237 |
|
85 |
2408 |
1606 |
1204 |
963 |
803 |
688 |
602 |
535 |
482 |
438 |
401 |
371 |
344 |
321 |
301 |
283 |
268 |
|
90 |
2700 |
1800 |
1350 |
1080 |
900 |
771 |
675 |
600 |
540 |
491 |
450 |
415 |
386 |
360 |
338 |
318 |
300 |
|
95 |
3008 |
2006 |
1504 |
1203 |
1003 |
860 |
752 |
669 |
602 |
547 |
501 |
463 |
430 |
401 |
376 |
354 |
334 |
|
100 |
3333 |
2222 |
1667 |
1333 |
1111 |
952 |
833 |
741 |
667 |
606 |
556 |
513 |
476 |
444 |
417 |
392 |
370 |
|
105 |
3675 |
2450 |
1838 |
1470 |
1225 |
1050 |
919 |
817 |
735 |
668 |
613 |
565 |
525 |
490 |
459 |
432 |
408 |
|
110 |
4033 |
2689 |
2017 |
1613 |
1344 |
1152 |
1008 |
896 |
807 |
733 |
672 |
621 |
576 |
538 |
504 |
475 |
448 |
|
115 |
4408 |
2939 |
2204 |
1763 |
1469 |
1260 |
1102 |
980 |
882 |
802 |
735 |
678 |
630 |
588 |
551 |
519 |
490 |
|
120 |
4800 |
3200 |
2400 |
1920 |
1600 |
1371 |
1200 |
1067 |
960 |
873 |
800 |
738 |
686 |
640 |
600 |
565 |
533 |
|
|
