The analysis of the IH-30 corridor with a moveable barrier-separated contraflow HOV lane did not indicate a change in injury crash occurrence. The IH-35E North and IH-635 corridors with buffer-separated, concurrent flow HOV lanes did show a change in crash occurrence with an increase in injury crash rates.

Overview of the study plan for the evaluation of 3 high-occupancy vehicle facilities currently being constructed in Houston, Texas.

The objective of this study is to identify and evaluate those variables in the vehicle-driver-roadway-weather system that contribute to accidents, with particular emphasis on the friction number. Accident information and skid data are obtained from two computer databases, the Master Accident Listing (MAL) and the Skid Summaries. A total of 94,000 accidents that took place between the years 1982 and 1987 in Tarrant County are analyzed. An important element in accident studies is the definition and identification of high accident locations. This report proposes a method by which each section of roadway is assigned a relative measure of severity based on the total number of accidents, injuries, and fatalities. The selection is further refined by considering sections with an unusually high number of wet weather accidents. A major effort was devoted to merging the friction data and accident factors for the selected high accident location.