Table 3.
Results of the mixed logit model.
Variable | Coeff. * | Std. Error | t | p-Value ** | |
---|---|---|---|---|---|
traffic control | signallight | −0.5801 | 0.0644 | −9.01 | <0.0001 |
stopsign | 0.2037 | 0.0587 | 3.47 | 0.0005 | |
location | Offroad *a | −2.5980 (2.9134) | 0.5779 | −4.50 | <0.0001(<0.0001) |
weather | Rain *a | −1.2411 (1.7131) | 0.3592 | −3.45 | 0.0006(<0.0001) |
sleet | −0.8620 | 0.2479 | −3.48 | 0.0005 | |
snow | −1.4201 | 0.2880 | −4.93 | <0.0001 | |
severcrosswinds | −0.7184 | 0.3243 | −2.22 | 0.0267 | |
road alignment | straigrade | 0.1569 | 0.0488 | 3.21 | 0.0013 |
curlevel | 0.2380 | 0.0669 | 3.56 | 0.0004 | |
curgrade | 0.3068 | 0.0800 | 3.83 | 0.0001 | |
functional system | uinterstatehighway | −0.7046 | 0.0618 | −11.40 | <0.0001 |
uotherprincipalarterial | −0.5464 | 0.0480 | −11.39 | <0.0001 | |
curb left | curbleft | −0.6472 | 0.0581 | −11.13 | <0.0001 |
median | positivebarrier | −0.5434 | 0.0548 | −9.91 | <0.0001 |
Unprotected *a | −1.8760 (−2.2862) | 0.3472 | −5.40 | <0.0001(<0.0001) | |
onewaypair | −0.6444 | 0.3111 | −2.07 | 0.0383 | |
factors | drug | 2.0215 | 0.1466 | 13.79 | <0.0001 |
fatigue | 0.7642 | 0.0935 | 8.18 | <0.0001 | |
Intercept | −2.1065 | 0.0278 | −75.85 | <0.0001 | |
Log likelihood | −19,352 (df = 22) | ||||
Sample size | 85,184 |
* Parentheses indicate the standard deviations of the random coefficient estimates. ** Parentheses indicate the p-value of the standard deviations of the random coefficient estimates. *a Denotes random parameters.