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Table 21: Difference of Average Crashes at Red Light Camera Intersections Since Installation Controlling for Exposure

The total average difference for all crashes, injury type of crash (injury and property damage), and crash type (rear end and angle) is included. The average difference in crashes varied by crash type and injury type. Positive differences indicate an increase in crashes, while negative differences indicate a decrease in crashes. Statistically significant differences are noted.

Table 21. RLC Intersection Differences of Averages at Intersections Before and After Controlling for Exposure

 

Differences in Averages for Each Type of Crash (RLC Years – Pre-RLC Years)

Intersection

Pre Count

Post Count

Total

Injury

PDO

Rear End

Angle

Academy & Wyoming

66

76

0.45

0.05

0.41

0.45

-0.32

Coors & Central

113

107

-0.45

-0.66

0.20

-0.61

-0.08

Central & Louisiana

48

39

-0.83

-0.15

# -0.68

-0.19

-0.49

Central & Eubank

40

58

* 1.00

0.22

# 0.78

0.61

0.33

Coors & Ellison

76

71

-0.53

-0.17

-0.36

-0.49

-0.13

Lomas & Wyoming

42

41

-0.52

-0.38

-0.14

-0.61

0.19

Lomas & Eubank

51

42

-0.43

0.00

-0.43

0.29

-0.24

Lomas & Juan Tabo

72

77

0.32

-0.16

0.47

# 0.53

# -0.36

Menaul & Carlisle

43

40

0.20

0.11

0.09

0.48

-0.05

Menaul & San Mateo

76

76

-0.19

# -0.38

0.18

-0.01

-0.06

Menaul & Louisiana

56

38

# -0.80

* -0.58

-0.22

-0.53

-0.24

Menaul & Wyoming

54

56

0.08

-0.16

0.24

0.28

# -0.32

Coors & Montano

109

137

0.53

0.19

0.34

0.60

-0.13

Montgomery & Carlisle

53

53

0.40

0.04

0.37

# 0.66

# -0.39

Montgomery & San Mateo

215

236

0.33

* -0.62

** 0.95

0.18

-0.10

Montgomery & Wyoming

117

101

-0.52

-0.26

-0.26

-0.35

-0.06

Montgomery & Eubank

175

135

* -0.72

** -0.65

-0.10

-0.32

* -0.40

Coors & Paseo

130

177

* 1.38

-0.03

** 1.41

** 1.50

# -0.26

Jefferson & Paseo

106

139

# 1.07

-0.05

* 1.12

* 1.17

-0.21

Coors & Quail

98

69

* -1.16

-0.40

* -0.76

0.08

***-0.88

Note: #>.1, *>.05, **>.01, ***>.001