|
| Variable | Parameter estimate | t-stat |
|
| Fatal injury |
| Constant (standard error of parameter distribution) | −11.57 (4.050) | −3.071 (2.572) |
| July indicator (1 if crash occurred in the month of July, 0 otherwise) | 0.60685 | 2.24 |
| Weekday indicator (1 if crash occurred during weekday, tractor or truck, 0 otherwise) | −0.53878 | −2.82 |
| Truck indicator (1 if truck was involved in crash, 0 otherwise) | 0.52432 | 2.70 |
| Night without road lights indicator (1 if crash occurred at night without road lights, 0 otherwise) (standard error of parameter distribution) | 0.93067 (1.524) | 4.92 (2.849) |
|
| Major injury |
| Constant | −0.870 | −6.645 |
| November indicator (1 if crash occurred in the month of November, 0 otherwise) | 0.41588 | 2.31 |
| Cloudy weather indicator (1 if crash occurred in cloudy weather, 0 otherwise) | 1.02062 | 3.37 |
| Curve indicator (1 if crash occurred at horizontal curve, 0 otherwise) | 0.33802 | 2.76 |
| Tuesday indicator (1 if crash occurred on Tuesday, 0 otherwise) | 0.26790 | 1.80 |
| Pothole indicator (1 if potholes were present in road, 0 otherwise) (standard error of parameter distribution) | −0.47476 (1.524) | −1.73 (2.849) |
|
| Minor injury |
| AM peak indicator (1 if crash occurred during AM peak hours, 0 otherwise) | −0.43013 | −2.56 |
| Driver dozing indicator (1 if crash cause was driver dozing, 0 otherwise) | −0.70923 | −2.28 |
| Driver age <25 years indicator (1 if driver age was less than 25 years, 0 otherwise) | 0.68938 | 3.91 |
| Driver carelessness indicator (1 if crash was caused by driver carelessness, 0 otherwise) (standard error of parameter distribution) | −0.26214 (1.107) | −2.50 (1.829) |
|
| No injury |
| Constant | −2.651 | −21.30 |
| Overspeeding indicator (1 if crash occurred due to overspeeding, 0 otherwise) | −0.80809 | −1.88 |
| Wet road surface indicator (1 if road surface was wet during crash, 0 otherwise) | 0.92734 | 2.78 |
| May indicator (1 if crash occurred in the month of May, 0 otherwise) | −1.56146 | −2.16 |
| Rickshaw indicator (1 if rickshaw was involved in crash, 0 otherwise) | 0.48651 | 2.40 |
| Clear weather indicator (1 if crash occurred in clear weather, 0 otherwise) | −0.55810 | −2.01 |
| Single-vehicle indicator (1 if single vehicle is involved in crash, 0 otherwise) | 0.00142 | 2.35 |
| Normal visibility indicator (1 if crash occurred during normal visibility conditions, 0 otherwise) | −0.53013 | −1.69 |
|
| Model statistical fitness |
| McFadden pseudo-R-squared | 0.27349959 | |
| Restricted log-likelihood | −2804.47349 | |
| Log-likelihood at convergence | −2037.46155 | |
| Akaike information criteria | 4124.9 | |
|
