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Table 22: Differences in Crashes per Million Entering Vehicles by Type of Injury and Type of Crash

Describes crashes per million entering vehicles by injury type and crash type for Red Light Camera intersections and for the monitored approaches. Overall crashes increased from the pre-period to the post-period and there was a slight increase in crashes per million entering vehicles. This change was not statistically significant for all approaches or monitored approaches only. Both injury crashes and angle crashes decreased from the pre-period to the post-period and the decrease in million entering vehicles was slightly statistically significant for injury crashes and moderately statistically significant for angle crashes. From the pre-period to the post-period PDO and rear end crashes increased both in frequency and crashes per million entering vehicles for both all approaches and monitored approaches.

 

Table 22. Differences in Crashes per MEV by Type of Injury and Type of Crash Pre to Post

 

Pre-period Crash Count

Post-period Crash Count

Count Increase / Decrease

Percent Increase / Decrease

Pre-period Crashes per MEV

Post-period Crashes per MEV

Difference in Crashes per MEV

All Approaches

Total Crashes

1740

1769

+19

+1.1

1.42

1.48

+0.06

Injury Crashes

579

459

-120

-26.1

0.45

0.39

*-0.06

PDO Crashes

1161

1308

+147

+12.7

0.98

1.09

*+0.11

Rear End Crashes

1256

1386

+130

+10.4

1.02

1.16

*+0.14

Angle Crashes

328

213

-115

-54.0

0.27

0.18

**-0.09

Monitored Approaches

Total Crashes

951

1,000

+49

+5.2

1.64

1.74

+0.10

Injury Crashes

329

270

-59

-21.9

0.55

0.46

*-0.09

PDO Crashes

622

729

+107

+17.2

1.09

1.25

#+0.16

Rear End Crashes

716

814

+98

+13.7

1.23

1.39

#+0.16

Angle Crashes

164

103

-61

-59.2

0.29

0.18

**-0.11

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