Journal of Advanced Transportation / 2019 / Article / Tab 2

Research Article

Identifying the Factors Contributing to Injury Severity in Work Zone Rear-End Crashes

Table 2

Rear-end injury severity model results.

VariablesFixed-parameters modelRandom-parameters model
Coefficientt-statP-valueCoefficient (standard deviation)t-statP-value

Young0.5666.577<0.0010.6756.156<0.001
Male0.3612.7510.005950.3922.3440.0191
Curve1.1886.567<0.0011.5297.069<0.001
Heavy0.2112.7170.0060.2883.0170.0025
Passenger0.3583.559<0.0010.2962.1190.0340
Weekday-0.773-7.857<0.001-0.844-6.99<0.001
Daytime-0.138-1.7590.07849-0.183-1.8970.0578
Fog-0.660-6.756<0.001-0.988 (1.047)-6.78<0.001
Summer0.3032.7970.005150.3292.5440.0109
Rural0.2963.2620.00110.4804.14<0.001
Speeding0.9937.293<0.0011.541 ( 1.695)6.265<0.001
N. lane closures0.5404.475<0.0010.7855.143<0.001
Asphalt0.7536.079<0.0011.1266.843<0.001
Milling-0.321-2.0790.037-0.419-2.3350.0195
Threshold 1,μ10.5582.440.01460.6262.1280.0333
Threshold 2,μ22.13529.424<0.0012.68420.95<0.001
Log-Likelihood at zero-992.5-992.5
Log-Likelihood at Convergence-790.5-769.8
Number of Observations10451045
AIC1612.9181575.51
BIC1667.1531664.642
McFadden Pseudo R20.2030.224

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