Research Article

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

Table 5

Calibration result of mixed logit model.

ChoiceVariableCoefficientt-value

DamageConstant−0.141−0.60
Dummy variable, if the path is narrow = 1, otherwise = 00.4601.93
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 0 (average)0.9783.01
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 0 (standard deviation)1.7032.35
Dummy variable, if the road is straight and flat = 1,otherwise = 0 (average)0.2802.32
Dummy variable, if the road is straight and flat = 1, otherwise = 0 (standard deviation)0.8262.20
Dummy variable, if the shoulder of the road is made lf soil = 1, otherwise = 00.5483.81
Dummy variable, if it is an official-commercial land use = 1, otherwise = 01.2762.95
Dummy variable, if the speed range is between zero and 40 km/h = 1, otherwise = 00.8322.61
Dummy variable, if the brake system has failure = 1, otherwise = 01.6281.89
Dummy variable, if the left turn of the vehicle is the cause of the accident = 1, otherwise = 00.9713.29
Dummy variable, if the driver is under the legal age of 18 = 1, otherwise = 02.0591.79
Dummy variable, if the driver’s hasteand acceleration according to the driver’s self-declaration or thetestimony of witnesses is the cause of the accident = 1, otherwise = 00.2322.07
Dummy variable, if the driver's unfamiliarity with the road is effective = 1, otherwise = 00.9961.91
Dummy variable, if the motorcycle is one of the parties to the accident = 1, otherwise = 03.4376.81

InjuryDummy variable, if it is rainy = 1, otherwise = 00.4652.28
Dummy variable, if the vehicle has a continuous technical defect = 1, otherwise = 01.0481.91
Dummy variable, if the road has protection = 1, otherwise = 0−0.693−2.36
Dummy variable, if the land use is recreational = 1, otherwise = 0−1.768−6.81
Dummy variable, if the land use is residential = 1, otherwise = 0 (average)−2.548−2.85
Dummy variable, if the land use is residential = 1, otherwise = 0 (standard deviation)2.2511.73
Dummy variable, if there be a middle refuge = 1, otherwise = 0−1.285−4.87
Dummy variable, if it is snowy = 1, otherwise = 00.7792.30
Dummy variable, if the bus is involved in an accident = 1, otherwise = 01.0462.64
Dummy variable, if the truck is involved in an accident = 1, otherwise = 01.0972.92
Dummy variable, if the driver’s gender is male = 1, otherwise = 00.5942.69
FatalConstant−2.270−9.05
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 0 (average)0.9783.01
Dummy variable, if two-sided road is nonseparate = 1, otherwise = 0 (standard deviation)1.7032.35
Dummy variable, if the driver’s haste andacceleration according to the driver’s self-declaration or the testimonyof witnesses is the cause of the accident = 1, otherwise = 00.2322.07
Dummy variable, if the driver's unfamiliarity with the road is effective = 1, otherwise = 00.9961.91
Dummy variable, if it is rainy = 1, otherwise = 00.4652.28
Dummy variable, if the vehicle has a continuous technical defect = 1, otherwise = 01.0481.91
Dummy variable, if the accident time is in the afternoon = 1, otherwise = 0−0.461−1.80
Dummy variable, if the land use is agricultural = 1, otherwise = 00.5641.80
Dummy variable, if the speed range is between 80 and 100 km/h = 1, otherwise = 0−0.551−1.90
Dummy variable, if the cause of the accident is overtaking = 1, otherwise = 01.7222.87
Dummy variable, if the trailer is involved in the accident = 1, otherwise = 01.0172.19
Dummy variable, if the motorcycle is one of the parties to the accident = 1, otherwise = 03.4376.81

Number of observations3262
LL0−2884.955
LLβ−2157.268
p20.135