The Tools for Operations Planning (TOPL) employs the Link-Node Cell Transmission model for macroscopic freeway traffic simulations for specifying operational strategies like ramp metering, demand and incident management.Traffic flow and occupancy data from loop detectors is used for calibrating these models and specifying the inputs to the simulation. However, flow data from ramps are often to ...

Ramp metering that uses traffic signals to regulate vehicle flows from the on-ramps has been widely implemented improve mobility of freeway. Previous studies generally update signal timings in real-time based on predefined measurements collected by point detectors, such as volumes and occupancies. Comparing with cameras—which have increasingly deployed road networks—could cover larger areas pro...

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/...

Traffic on freeways can be managed by means of ramp meters from Road Traffic Control rooms. Human operators cannot efficiently manage a network of ramp meters. To support them, we present an intelligent platform for traffic management which includes a new ramp metering coordination scheme in the decision making module, an efficient dashboard for interacting with human operators, machine learnin...

We propose a technique for synthesizing switching guards for hybrid systems to satisfy a given state-based safety constraint. Using techniques from sum of squares (SOS) optimization, we design guards defined by semialgebraic sets that trigger mode switches, and we guarantee that the synthesized switching policy does not allow Zeno executions. We demonstrate our approach on an example of switche...

It is shown how an entropy-based Lyapunov function can be used for the stability analysis of equilibria in networks of scalar conservation laws. The analysis gives a sufficient stability condition which is weaker than the condition which was previously known in the literature. Various extensions and generalisations are briefly discussed. The approach is illustrated with an application to ramp-m...