Type of variable

Independent variables

Coefficient estimate

Standard Error

t (Estimate/SE)

Mean

Standard Deviation

Minimum

Maximum

Global

Travel time

1.104

0.268

4.115

Local

Time of the day

−0.311

2.889

−5.466

4.408

Day of the week

6.683

10.115

−6.382

33.278

Weather

−0.079

3.062

−8.717

3.407

Lighting Condition

1.237

2.820

−3.271

8.798

Crash severity

0.701

2.854

−9.373

10.800