Integrated ATT strategies for urban arterials: DRIVE II project PRIMAVERA, 3: the Dewsbury Road experience

This is the third paper in a series about the DRIVE II project PRIMAVERA, and presents the results from the Dewsbury Road trial site in Leeds, England. PRIMAVERA is concerned with developing and evaluating strategies which integrate Advanced Transport Telematics (ATT) components for queue management, public transport priority, and traffic calming on urban arterial roads. A trial was conducted on a 3km section of the A653, the Dewsbury Road, one of the main radial routes into Leeds, carrying about 23,000 vehicles per day, including many buses. Six queue management strategy components and two bus priority strategy components were investigated for this site. Three of the queue components were incorporated into the SPOT system, five into the SCOOT system, and two into both systems. SPOT-based and SCOOT- based simulation results were obtained, using the NEMIS microsimulation package. Based on the expected changes indicated by the simulations, field trials were designed, to enable the measurement of statistically significant values of changes for a wide variety of effects. Surveys were conducted, and trial results were obtained, for: (1) car and bus flows and speeds; (2) journey times; (3) pedestrian delays; (4) conflicts; and (5) queues.