Engineering Commons^™

A Case Study On Multi-Lane Roundabouts Under Congestion: Comparing Software Capacity And Delay Estimates With Field Data, Xuanwu Chen, Ming Lee

Department of Civil and Environmental Engineering Faculty Publications

Existing studies on modern roundabouts performance are mostly based on data from singe lane roundabouts that are not heavily congested. For planners and designers interested in building multilane roundabouts for intersections with potential growth in future traffic, there has been a lack of existing studies with field data that provide reference values in terms of capacity and delay measurements. With the intent of providing such reference values, a case study was conducted by using the East Dowling Road Roundabouts in Anchorage, Alaska, which are currently operating with extensive queues during the evening peak hours. This research used multiple video camcorders …