Safety Evaluation of Priority Techniques for High-occupancy Vehicles


Book Description

Priority treatments for high-occupancy vehicles (HOV) can introduce new safety problems due to operational or geometric modifications. At the same time, they can reduce the accident potential by improving overall traffic operations. The research focused on five major areas of HOV projects: (1) an examination of the pertinent accident rates, (2) an analysis of causative factors influencing safety, (3) an identification of difficult maneuvers and potential safety problems. (4) the development of recommendations to improve safety, and (5) a review of the legal authority and legal liability issues faced by HOV projects.




Preferential Lane Treatments for High-occupancy Vehicles


Book Description

This synthesis will be of interest to transportation planners, highway engineers, environmental personnel, highway design engineers, transit planners, highway administrators, and others concerned with the planning, design, and operational features of preferential high- occupancy vehicle (HOV) lanes on highways. Information is provided on the current and proposed state of the practice in North America. This synthesis describes the state of the art with respect to preferential treatment for HOVs on highways. This report of the Transportation Research Board provides information on long-distance facilities, such as barrier-separated, concurrent-flow (separated and nonseparated), and contraflow facilities, as well as on short-distance facilities, such as queue by-pass lanes. Planning, design, and operational features of each treatment are described. The issues and operating results are described, and specific case studies are included.