Abstract
TRB’ Transportation Research Record: Journal of the Transportation Research Board 1862 examines the effects of centerline rumble strips on lateral vehicle placement and speed, and on crash and driver behavior. This issue also provides assessments and modeling of road visibility under fog; presents findings on the design, luminance, conspicuousness, and retroreflectivity of traffic, warning, and regulatory signs; and examines intrusion detection technologies and a collision frequency and consequence model for rail grade crossings. The papers contained in this volume were among those presented at the 83rd Annual Meeting of the Transportation Research Board in January 2004.