A COST-BENEFIT ANALYSIS OF HEAVY VEHICLE UNDERRUN PROTECTION

Victoria's road crash database does not directly identify truck underrun crashes. A total of 3,488 potential underrun crashes were selected on the basis of DCA codes for the period 1996-2000 inclusive. The three most common types of crashes involved rigid trucks - a rigid truck hitting the rear of a lighter vehicle, followed by a lighter vehicle striking the side of a rigid truck, and then a rigid truck running into the side of a lighter vehicle. The fourth, fifth and sixth most common types of crashes involved articulated trucks: an articulated truck hitting the rear of a light vehicle, followed by an articulated truck running into the side of a lighter vehicle, and then a lighter vehicle striking the side of an articulated truck. Fatalities were most likely to occur in crashes involving the front of a truck. A number of assumptions underpinned the calculation of benefit:cost ratios (BCRs), including the actual occurrence of underruns and the effectiveness of underrun protection. For all of the underrun protection scenarios examined, the BCRs were higher for articulated than rigid trucks. (a) For the covering entry of this conference, please see ITRD abstract no. E210298.