In this paper, we present a novel switching traffic-responsive ramp-metering controller that adapts to the different traffic dynamics under different congestion conditions—free-flow or congested. The approach of multirate linear quadratic control with integral action (LQI) is employed to compensate for disturbances and to accommodate the difference between the model sampling time and the meteri...

Homogeneous traffic flows are believed to be better in absorbing disturbances, raise capacity and stimulate traffic safety. Measures to make traffic more homogeneous are therefore often taken to increase capacity. This paper shows that the ability of a traffic flow to deal with traffic coming from an on-ramp reduces when the through flow becomes more homogeneous. A motorway was modelled in the ...

The En-route Descent Advisor (EDA) is a set of decision support tool (DST) capabilities for managing complex en route traffic subject to metering restrictions. The goal is to enable controller procedures to evolve from today’s emphasis on sector management towards procedures more oriented towards trajectory management. EDA will help controllers transition traffic from a “Free Flight” (minimally...

A method is presented to divide the measured total congestion in any freeway section into three ‘slices’: (1) the delay that collisions cause; (2) the potential reduction in delay at bottlenecks that ideal ramp metering can achieve; and (3) the remaining delay, due mainly to excess demand, but also to all other causes, including non-collision incidents, lane closures, and weather. The method in...

This paper presents a feedback control design for a coordinated ramp metering problem. We design an optimal traffic allocation scheme for ramps based on Godunov’s numerical method and using distributed-diffusive model. Most of the previous work for designing feedback control for ramp metering is based on either the discretized linear methods such as ALINEA or nonlinear methods based on the traf...

During the last century, there has been considerable economic growth and development of cities around the world. The growth has led to an expansion of car-ownership and ultimately increased congestion of the road network. Traffic engineers and transport planners have attempted to mitigate the consequences of congestion of motorways and freeways using a number of techniques. One of which has bee...

With the emergence of the modern roundabout as an effective form of traffic control in the United States, more and more information is needed when situations arise in which additional traffic control is required. The signalization and metering of roundabouts can relieve congestion during peak hours of the day as well as possibly provide safer access for pedestrians and cyclists. Although the si...

Define traffic efficiency and safety criteria for Utah’s first ASCS. Define Measures of Effectiveness (MOE’s) to assess these criteria. Project Manager: Lindsey, Rukhsana Phone: (801) 965-4196 Fax: (801) 965-4564 Email: [email protected] Investigator: Martin, Peter Development and Evaluation of a Multi-Agent Based Neuro-Fuzzy Arterial Traffic Signal Control System Start date: 2006/...

My PhD research focuses on traffic management in freeway networks subject to random disturbances that compromise link capacities. Such disturbances are responsible for a significant portion of congestion in transportation networks, which leads to enormous economic and environmental losses. My research develops a framework that systematically considers the presence of unreliable capacities in th...

This paper proposes a nonlinear approach for designing traffic responsive and coordinated ramp control using a self adapting fuzzy system. The traffic responsive metering rate is determined every minute by an adaptive fuzzy logic algorithm. The coordination between multiple on-ramps is ensured by the integration of a common input into all ramp controllers upstream of a bottleneck and a periodic...