Entry-Lane Capacity Analysis of Roundabouts in Texas Using VISSIM, SIDRA, and the Highway Capacity Manual

摘要: Road safety and traffic congestion are two of the critical issues facing transportation profession today. As a means to promote efficiency at United States intersections modern roundabouts becoming more common. Over last ten years, implementation methodologies have been developed using data collected U.S. roundabouts. These were first published in 2007 as National Cooperative Highway Report 572: Roundabouts also 2010 by Federal Administration its second edition national roundabout guidelines. This work attempts enhance aspects these guidelines related operations exploring effects exiting flow, origin-destination patterns, mean speed on entry-lane capacity. A methodology for calibration validation VISSIM is developed. Capacity results from compared Manual capacity curve SIDRA see how well they predict