The area of highway capacity is receiving considerable attention because of the 1994 update of the 1985 Highway Capacity Manual and the ongoging research effort within the Federal Highway Administration (FWHA), Federal Transit Administration (FTA), and the Transportation Research Board (TRB) National Cooperative Highway Research Program (NCHRP), all leading toward the next edition of the Highway Capacity Manual, which will be published around 2000. The highway capacity issues related to interrupted flow facilities are examined in papers on delays at oversaturated unsignalized intersections; capacity of yield-controlled intersections; capacity of two-way stop-controlled intersections; travel times on urban arterial streets; evaluating lane utilization for auxiliary through-lanes at signalized intersections; capacity for right turn on red; effects of trucks on left-turning queues at compressed diamond interchanges; and the development of a safety-based level-of-service criterion for signalized intersections. Uninterrupted flow facilities are addresed in papers on speed-flow relationships on rural highways; providing acceptable levels of service at toll plazas; perceptage time delay for rural highways; assessing the dynamics of freeway flows; and the nature of breakdowns at freeway merge junctions. The papers presented in this volume were peer-reviewed and were sponsored by the Committee on Highway Capacity and Quality of Service and the Committee on Methodology for Evaluating Highway Improvements. (A)
Samenvatting