Traffic Operations and Management

Evaluates the feasibility of combining signal coordination and other operational improvements with transit priority treatments on signalized arterials. The study presents an assessment of promising operating strategies and technologies for signal coordination and transit priority, as well as a corridor-level feasibility analysis applying these strategies and technologies to one San Francisco Bay Area arterial, San Pablo Avenue in the East Bay.

This paper describes a methodology for predicting the robustness of signal timing plans and their associated control technology under varying demand and capacity conditions. The proposed methodology involves the selection of a signal timing analysis tool and the repeated application of that tool for various demand/saturation flow ratio scenarios that might occur at the critical bottleneck of the system during the selected peak period over the course of a year. The results are then combined into estimates of whole year average performance and 95 percentile worst performance. A new indicator...

Dynamic toll pricing based on demand can increase transportation revenue while also incentivizing travelers to avoid peak traffic periods. However, given the unpredictable nature of traffic, travelers lack the information necessary to accurately predict congestion, so dynamic pricing has minimal effect on demand. Dynamic toll pricing also poses equity concerns for those who lack other travel options. This research explores a potential remedy to these concerns by using a simple “futures market” pricing mechanism in which travelers can lock in a toll price for expected trips by prepaying for...

Adaptive traffic signal control as well as transit signal priority (TSP) have both been viewed as important opportunities for reducing overall traffic congestion and improving bus transit service. However few studies have been conducted on combining them. A dynamic signal timing optimization model was developed in this research, which aims at reallocating green times among the phases with considering the realtime traffic flow condition and the bus priority request. In the model, both arrival and departure flows are described by time- dependent functions, the arrival of a bus with priority...