Table 2: Estimation results for the quasi-Poisson models.

Coefficients for parametersFatal-injury ( )Property-damage-only ( )
Coefficient stat.Coefficient stat.

Explanatory variables
 Intercept−2.533−17.383−0.713−3.839
 Road segment in rural areas*
 Road segment in urban areas−0.393−2.844##
 Intersection density0.1005.9220.13011.310
 Ownership at state or federal levels*
 Ownership at other levels0.2751.9740.4413.991
 Pavement condition rating##−0.100−2.141
 Percent average daily trucks−0.083−4.305−0.085−5.071
Dispersion parameter
3.09616.415

# Indicates that the coefficient is statistically insignificant.
*Reference categories.