highways

Some field studies have observed reductions in travel time by coordinating freeway ramps with adjacent arterial signals. To advance the investigation, the researchers propose an integrated traffic management strategy that involves variable speed limit, lane change, ramp metering for freeway traffic flow control, and a traffic-responsive signal control scheme for adjacent traffic light intersections.

This study examined the impact of replacing the Vermont state fuels tax with a revenue-neutral, mileage-based user fee using mileage and fuel economy data for over 300,000 registered passenger vehicles.

This dataset is associated with a study that examines the extent to which public perceptions of mileage fees are guided by misinformation or lack of information using a national, internet-based survey. The research team employs hypothetical voting opportunities to gather respondent support for mileage fees, coupled with educational treatments that address mileage fee fairness, privacy, and costs.

This includes data used in the project "Coordinated Traffic Flow Control in a Connected Environment." The data sharing mechanism strengthens the connection between the freeway and arterial networks and enhances the control performance.

This research studied the feasibility of the deployment of renewable hydrogen fueling for fuel cell electric vehicles and DC fast charging stations for plug-in electric vehicles at highway safety roadside rest areas and the integration of stations with the electricity grid in California.

This project proposed a hierarchical ramp merging system that not only allowed microscopic cooperative maneuvers for connected and automated electric vehicles on the ramp to merge into mainline traffic flow, but also had controllability of ramp inflow rate, which enabled macroscopic traffic flow control.