The Traffic Accident Reconstruction Origin -Article-


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Table 1. Test Data and Resulting Drag Factors

TEST CONDITIONS: WET SURFACE

Test No

Speed at Lockup

Skid Distance

Timer No 1

Timer No 2

Timer No 3

m

Radar

Speedometer

(mph)

(mph)

(feet)

(sec)

(sec)

(sec)

(distance)

(time)

1

30.0

***

64.4

2.71

2.79

2.75

0.467

0.497

2

34.0

***

76.3

2.65

2.64

2.80

0.506

0.574

3

31.0

***

62.2

2.76

2.84

2.67

0.516

0.512

4

31.0

***

67.3

2.86

2.82

2.97

0.477

0.490

5

32.0

***

63.5

2.80

2.94

3.00

0.539

0.500

6

42.0

45

108.2

3.73

3.74

3.76

0.545

0.511

7

40.0

45

118.4

4.08

3.91

3.95

0.451

0.458

8

41.0

45

120.1

3.77

3.89

3.91

0.468

0.484

9

41.0

44

118.3

3.85

3.84

3.82

0.475

0.487

10

40.0

45

114.4

3.88

3.84

3.92

0.467

0.470

11

51.0

54

181.3

4.88

4.88

4.85

0.479

0.477

12

53.0

54

192.2

5.00

4.93

5.05

0.488

0.483

13

53.0

55

203.9

5.25

5.07

5.27

0.460

0.465

14

54.0

55

208.4

5.39

5.22

5.42

0.467

0.460

15

58.0

56

201.6

5.27

5.18

5.19

0.557

0.507

16

75.0

74

327.7

7.34

6.89

***

0.573

0.480

17

71.0

75

366.8

7.15

6.88

7.11

0.459

0.459

18

73.0

74

348.4

6.60

6.53

***

0.511

0.506

19

70.0

73

350.0

6.94

6.84

7.00

0.468

0.460

20

73.0

75

409.6

7.28

7.18

7.43

0.435

0.456

21

71.0

74

355.3

6.99

6.25

6.83

0.474

0.483

23

32.0

35

71.4

2.89

2.65

2.96

0.479

0.514

24

32.0

35

79.1

2.97

2.81

3.00

0.432

0.498

25

30.0

34

68.8

2.86

2.85

2.91

0.437

0.476

26

31.0

35

71.9

3.29

2.96

2.95

0.446

0.460

27

31.0

35

78.4

2.94

2.81

3.04

0.409

0.482

28

41.0

45

132.7

4.02

4.07

4.06

0.42

0.46

29

41.0

45

133.3

3.91

3.95

4.08

0.42

0.47

30

40.0

44

118.3

3.76

3.75

3.85

0.45

0.48

31

40.0

45

129.7

3.83

3.91

3.97

0.41

0.47

32

48.0

54

179.4

4.67

4.72

4.73

0.43

0.46

33

52.0

55

204.0

5.00

5.03

***

0.44

0.47

34

52.0

55

202.0

5.07

4.98

5.15

0.45

0.47

35

53.0

55

204.0

5.11

5.06

5.02

0.46

0.48

TEST CONDITIONS: DRY SURFACE

37

32.0

35

47.5

2.32

2.08

2.08

0.72

0.67

38

33.0

35

44.7

2.19

2.13

2.16

0.81

0.70

39

34.0

35

49.1

2.01

2.19

2.09

0.79

0.74

40

30.0

35

51.0

2.24

2.16

2.29

0.59

0.61

41

68.0

73

216.9

4.42

4.32

4.20

0.71

0.72

42

68.0

73

231.1

5.05

4.71

4.07

0.67

0.67

 

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