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Slide to Stop Distance Chart

Typical coefficients of friction:
Wet, packed snow (0.30-0.60), Dry, traveled 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