Method

Fatal and injury crashes

Total crashes

CMF

Standard Error (SE)

CMF

Standard Error (SE)

1) Before-and-after with

EB method

1.01

0.025

1.16

0.016

2) Before-and-after with comparison group method

1.35

0.047

1.27

0.019

3) Cross-sectional method

1.62

0.244

1.25

0.112