Collecting Usage Data for Analyzing a Heavy-Vehicle,Divisible-Load Permit System

Abstract

The collection of truck usage data for performing a benefit-cost analysis of the New York State Divisible-Load Permit System is described. To motivate the data collection requirements, the procedures used for estimating both infrastructure costs and economic benefits are briefly described. The survey procedure is summarized, as are data gathered on permitted vehicles, operator characteristics, and truck usage. Advantages and shortcomings of the methodology for collecting data are reviewed from the perspective of analyzing divisible-load permit systems for heavy vehicles. The overall study is one of the first attempts to assess the economic impact of permit systems based on actual usage data provided voluntarily by truck operators through seasonal mail surveys. As illustrated by the authors in a 1994 report, the economic benefits of a permit system for trucks hauling heavy divisible loads can be substantial. The collected survey data were adequate for providing order-of-magnitude estimates of benefits and costs although bridge damage and accident costs could not be evaluated because of a lack of data. Results should therefore be of interest to transportation officials throughout the country for use in evaluating the merits of allowing extra-heavy vehicles on the roads.