A Review of Statewide Traffic Data Collection, Processing, Projection and Quality Control

Abstract

Three of the most essential metrics of highway system operation are the volume, composition and weight of traffic using the roadway and street network. Agencies need timely and reliable traffic information to perform their varied duties in the areas of planning, design, construction, maintenance and operation of roads. If the collected data are not current and accurate, decisions made by the agency may be delayed or incorrect. This study identifies appropriate measures to ensure that high-quality traffic data are collected, processed, analyzed and reported in an optimal and cost-effective way by the New Mexico Department of Transportation. This is achieved through an in-depth review of the Department’s current procedures, including interviews with individuals, both inside and outside of the agency, who have traffic data responsibilities. A survey of best practices in traffic data collection at the national level, as identified in the technical literature and an examination of programs in selected states was also undertaken.