PATH

The Naturalistic Driver Model: A Review of Distraction, Impairment and Emergency Factors

Caird, J.K.
Lees, M.
Edwards, C.
2005

The purpose of this project is to review the literature on driver distraction, impairment and emergency response that supports the development of the Naturalistic Driver Model. Driver models that are based on high-quality empirical research are more likely to serve as a useful and valid tool to professionals and researchers.

Theoretical And Empirical Analysis Of Path Magnetic Lane Tracking For The Intelligent Vehicle Highway System

Andrews, Angus
Rockwell International Science Center
1992

This report characterizes the statistical performance of the magnetic nails concept for estimating the positions of vehicles within their marked lanes. The report also presents a mathematical model for sensor noise due to the distortions of the earth field by regular patterns of ferrous reinforcing bars in the pavement.

San Gabriel Valley Smart Shuttle Technology (SGVSST) Field Operational Test Evaluation: Final Report

Giuliano, Genevieve
Moore, II, James E.
O'Brien, Thomas
Golob, Jacqueline
2002

This report presents results of the San Gabriel Valley Smart Shuttle (SGVSS) Field Operational Test (FOT). Results are drawn from a comprehensive evaluation of the FOT conducted over a three-year period. The SGVSS attempted to integrate services of three local municipal public transit operators and a regional fixed route operator via networked computer-assisted dispatching, automated vehicle location, and mobile data terminals. The integrated system was never fully deployed. We describe the project, its participants and the history of the project. The portions of the SGVSS that were...

Radio Frequency ID Tags to Enhance Safety

Misener, Jim
Li, Kang
2009

This project was originally conceived and executed to deliver a proof-of-concept of a near-term “cooperative vehicle-highway system” using a Radio Frequency Identification (RFID) tagging system to significantly improve the reliability of rear-end truck-based forward collision warning (FCW) systems. A hardware apparatus was developed but proved difficult and relatively costly to design and prototype; however, one set of RFID apparatus was delivered by our Raytheon subcontractor to PATH, then it was tested at PATH. Because of range limitations it did not perform to the extent that it could...

Development of the Capability-Enhanced PARAMICS Simulation Environment

Chu, Lianyu
Liu, Henry
McNally, Michael
Recker, Will
2005

This report summarizes research work conducted under TO4304 at the University of California, Irvine. Under this task order, the research team provided Caltrans with on-call direct support, technical guidance, and research related support. A series of Paramics plug-ins were developed and have been released to Caltrans. These plug-ins include actuated signal, multiple actuated signal timing plan, actuated signal coordination, detector data aggregator, ramp metering control, on-ramp queue override control, ALINEA ramp metering control, BOTTLENECK ramp metering control, SWARM Ramp metering...

Experimental Automatic Lateral Control System For An Automobile

Peng, Huei
Zhang, Wei-bin
Arai, Alan
Lin, Ye
Hessburg, Thomas
Devlin, Peter
Tomizuka, Masayoshi
Shladover, Steven
1992

This report summarizes an experimental effort in integrating and testing an automated vehicle lateral control system. The project, a cooperative effort between the California Partners for Advanced Transit and Highway ( PATH) Program and IMRA America, Inc., included a discrete roadway reference system, on-vehicle magnetic sensing system, a computer control system and a hydraulic actuator.

Multi-Channel Medium Access Control for Dedicated Short Range Communications

Mak, Tony K.
Laberteaux, Kenneth P.
Sengupta, Raja
Ergen, Mustafa
2006

This paper describes a medium access control (MAC) protocol to enable multi-channel operation for dedicated short range communication (DSRC). In particular, we focus on the challenge of supporting potentially high-bandwidth commercial or info-tainment communications between vehicle and roadside in hotspots over several service channels, while concurrently enabling time-critical vehicle-vehicle communication for safety in a separate channel. In our architecture, within hotspots, communication is aided by one of the access points in the hotspot. This access point is designated the...

An Information And Institutional Inventory Of California Transit Agencies

Hickman, Mark
Day, Theodore
1996

This research identifies and investigates the current technical and institutional framework for information systems and technologies at public transit agencies in California. The study examines the current state-of- the-art practice for the collection, use and sharing of data for operations monitoring, service planning, performance measurement and customer information. A survey of transit agencies and site visits were conducted. This paper presents these survey results and generates some conclusions for improving agencies.

Dynamic Path-Based Equilibrium Assignment With Microscopic Traffic Simulation

Liu, Henry
Lianyu, Chu
Recker, Will
2005

This report summarizes research work conducted under TO4158 at the California ATMS Testbed of the Institute of Transportation Studies at the University of California, Irvine. Under this task order, the California ATMS testbed hosted two full-time PATH research postdocs (Henry Liu and Lianyu Chu) whose general responsibilities are focused on applications of ATMS in the Testbed environment. They are generally responsible for ensuring that the functional capabilities of the Testbed are designed, developed and maintained in a manner that complements and enhances the ATMS research objectives of...

Medium Access Control Protocol Design for Vehicle-Vehicle Safety Messages

Xu, Qing
Mak, Tony
Ko, Jeff
Sengupta, Raja
2005

We propose a Medium Access Control (MAC) protocol design for a vehicle to send safety messages to other vehicles. We develop a QoS model for safety messages consistent with the active safety systems literature. Each message has a range and useful lifetime. The QoS target is to have each message be received with high probability within its specified lifetime by each vehicle within its specified range. The protocol design is based on rapidly re-broadcasting each message multiple times within its lifetime in combination with the 802.11 DCF. This makes the design compatible with the emerging...