rucking safety has become an increasingly
important transportation policy
concern in recent years. This concern was
heightened by sizeable increases in trucking
activity following economic deregulation
of the interstate trucking industry in
1980, deregulation of the intrastate trucking
industry in 1995, and the enactment of
NAFTA (Wilson 2001). Despite growing
awareness of the complexity of firms’ operating
environments and the stochastic nature
of crashes, studies of large truck safety