Operational Improvements at Traffic Circles

Congestion and accidents are currently experienced at many existing traffic circles that were designed to handle lesser traffic volumes than today's volumes. Operational alternatives are needed to extend the life of these circles until they can be rebuilt (5-20 years). To study operational alternatives, traffic simulation computer software will be used to accurately model the geometry & traffic on the studied circles, and to provide animated graphics of traffic movements. Using this software, operational alternatives such as ramp metering, sign and line treatments, reconstructing or adding lanes, etc. will be evaluated in terms of improved traffic flow and increased safety at the circles. A cost-benefit analysis for each operational alternative will also be done.