PATH

This report reviews the recent studies adopted in order to understand drivers' behavior, and in particular, behavior when influenced by an Advanced Traveler Information System (ATIS). Different approaches were used in these studies: field experiments, route choice surveys, interactive computer simulation games, route choice simulation and/or modeling, and stated preference. These studies are classified according to the main approach used, and the main objective, method, and findings are presented. Results indicate the need to understand how drivers choose or change routes in the absence of...

In this report, we develop nonlinear dynamical models and longitudinal control algorithms that coordinate variable compression brake mechanism with service brakes for a Class-8 commercial heavy vehicle. For the coordination and full use of these retarding actuators, we model the multivariable system based on physics-based principles and experimental data. We show that, for one specific critical braking maneuver, the coordination of compression and service brakes reduces the use of the service brakes by a factor of 45, and that it reduces the settling time by a factor of 2. Key words:...

The highway congestion monitoring program (HICOMP) report is based on data from tach vehicle runs or PeMS. Research under TO 5319 compares the accuracy and cost of these two alternatives. The detailed studies described in the report lead to the following conclusions and suggestions for follow-on work:1. In freeway sections with good quality detectors spaced at most one-half mile apart, PeMS-based estimates of the magnitude, extent and duration of congestion are incomparably more accurate than those based on tach vehicle runs.2. Because at most four days of tach run data are used to...

The Efficient Deployment of Advanced Public Transportation Systems (EDAPTS) demonstration at California State Polytechnic University, Pomona assessed the viability of using the EDAPTS procurement, installation, verification, and validation processes in a small transit environment to reduce the cost of ownership for technology solutions. Modified Systems Engineering processes were used to deploy an Intelligent Transportation System (ITS) solution on the Cal Poly Pomona Bronco Express campus bus system. This report provides a summary of methodologies used, outcomes, findings, recommendations...