Research Article

Spatial-Temporal Analysis of Crash Severity: Multisource Data Fusion Approach

Table 4

Calibration result of multinomial logit model.

ChoiceVariableCoefficientt-value

DamageConstant−0.08−0.39
Dummy variable, if the path is narrow = 1, otherwise = 00.3682
Dummy variable, if the road is straight and flat = 1, otherwise = 00.21.87
Dummy variable, if the shoulder of the road is made lf soil = 1, otherwise = 00.4633.95
Dummy variable, if it is an official-commercial land use = 1, otherwise = 01.0852.93
Dummy variable, if the speed range is between zero and 40 km/h = 1, otherwise = 00.7442.88
Dummy variable, if the brake system has failure = 1, otherwise = 01.4151.94
Dummy variable, if the left turn of the vehicle is the cause of the crash = 1, otherwise = 00.8573.59
Dummy variable, if the driver is under the legal age of 18 = 1, otherwise = 01.8731.79
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 00.5714.87
Dummy variable, if the driver’s haste and acceleration according to the driver’s self-declaration or the testimony of witnesses is the cause of the crash = 1, otherwise = 00.181.95
Dummy variable, if the driver's unfamiliarity with the road is effective = 1, otherwise = 00.7881.83

InjuryDummy variable, if it is rainy = 1, otherwise = 00.4332.94
Dummy variable, if the vehicle has a continuous technical defect = 1, otherwise = 00.9412.02
Dummy variable, if the road has protection = 1, otherwise = 0−0.608−2.4
Dummy variable, if the land use is recreational = 1, otherwise = 0−1.528−7.5
Dummy variable, if the land use is residential = 1, otherwise = 0−1.444−9.66
Dummy variable, if there be a middle refuge = 1, otherwise = 0−1.092−4.82
Dummy variable, if it is snowy = 1, otherwise = 00.6292.2
Dummy variable, if it is negative slope turn = 1, otherwise = 00.6521.92
Dummy variable, if the bus is involved in an crash = 1, otherwise = 00.862.72
Dummy variable, if the truck is involved in an crash = 1, otherwise = 00.9083.05
Dummy variable, if the driver’s gender is male = 1, otherwise = 00.4922.64
FatalConstant−0.913−1.89
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 00.5714.87
Dummy variable, if the driver’s haste and acceleration according to the driver’s self-declaration or the testimony of witnesses is the cause of the crash = 1, otherwise = 00.181.95
Dummy variable, if the driver's unfamiliarity with the road is effective = 1, otherwise = 00.7881.83
Dummy variable, if it is rainy = 1, otherwise = 00.4332.94
Dummy variable, if the vehicle has a continuous technical defect = 1, otherwise = 00.9412.02
Dummy variable, if the crash time is in the afternoon = 1, otherwise = 0−0.434−1.73
Dummy variable, if the land use is agricultural = 1, otherwise = 0−0.515−1.8
Dummy variable, if the speed range is between 80 and 100 km/h = 1, otherwise = 0−0.503−1.8
Dummy variable, if the cause of the crash is overtaking = 1, otherwise = 01.7142.97
Dummy variable, if the trailer is involved in the crash = 1, otherwise = 00.9542.14

Number of observations3262
LL0−2157.3
LLβ−1866.8
p20.129