Safety Impacts of Intersection Sight Distance

Abstract

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 228: Safety Impacts of Intersection Sight Distance documents the methodology and presents the results fromNCHRP Research Report 875: Guidance for Evaluating the Safety Impacts of Intersection Sight Distance. It provides the underlying research on estimating the safety effects of intersection sight distance (ISD) at stop-controlled intersections. To establish the relationship between ISD and safety at stop-controlled intersections, crash, traffic, and geometric data were collected for 832 intersection approaches with minor-road stop control in North Carolina, Ohio, and Washington. NCHRP Research Report 875: Guidance for Evaluating the Safety Impacts of Intersection Sight Distance is a resource for practitioners involved in the planning, design, operations, and traffic safety management of stop-controlled intersections. It provides information on how to estimate the effect of ISD on crash frequency at intersections and describes data collection methods and analysis steps for making safety-informed decisions about ISD. The guidance also provides basic information on the importance of ISD that can be shared with decision makers and other stakeholders. A PowerPoint presentation that describes the project also accompanies the report and web-only document.