Evaluation of Ramp Metering Impacts on Travel Time Reliability and Traffic Operations through Simulation

Performance Evaluation of Adaptive Ramp Metering Algorithms Using Microscopic Traffic Simulation Model

This work was performed as part of the ATMS Testbed Research and Development Program of the University of California, Irvine.* The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views of polices of the State of California. This report does not constitut...

Control of traffic with anticipative ramp metering

When there are different routes from origin to destination in a network, the traffic divides itself over these routes. The resulting assignment is often determined by the travel times on the different routes. When control measures are implemented the travel times for some routes change, which can lead to a change in the assignment. This change in assignment can effect the performance of the who...

Evaluation and Improvement of the Stratified Ramp Metering Algorithm Through Microscopic Simulation - Phase II

A new ramp metering strategy implemented on the Twin Cities freeway system to reduce ramp waiting times was evaluated through microsimulation of freeway activity. The study compared Stratified Ramp Metering strategy with the previous Zone Metering Strategy and with no control strategy. Comparison with Zone, which was designed to favor freeway flow, showed the new strategy succeeded in greatly r...

Traffic Diversion Resulting from Ramp Metering

Effects of on-ramp and off-ramp metering on queue forming in urban traffic networks

To control the traffic flows near on-ramps and off-ramps, ramp metering installations can be used. We compare on-ramp metering and off-ramp metering, with respect to queue forming and total time spent. Both control measures are used to improve traffic flow on freeways, and both have influence on the route choice of the drivers. Although the two measures are very similar, there are some major di...