Traffic Operations and Management

Smart Parking Management Pilot Project: A Bay Area Rapid Transit (BART) District Parking Demonstration

Shaheen, Susan
Rodier, Caroline
Eaken, Amanda M.
2005

In almost every major city in the U.S. and internationally, parking problems are ubiquitous. It is well known that the limited availability of parking contributes to roadway congestion, air pollution, and driver frustration and that the cost of expanding traditional parking capacity is frequently prohibitive. However, less research has addressed the effect of insufficient parking at transit stations on transit use. In the San Francisco Bay Area, parking has recently been at or near capacity at many of the 31 Bay Area Rapid Transit (BART) District stations with parking facilities. Smart...

Development of A Path Flow Estimator for Inferring Steady-State and Time-Dependent Origin-Destination Trip Matrices

Zhang, Michael
Nie, Yu
Shen, Wei
Lee, Ming S.
Jansuwan, Sarawut
Chootinan, Piya
Pravinvongvuth, Surachet
Chen, Anthony
Recker, Will W.
2008

Reliable origin/destination (O-D) data are critical to many applications in transportation planning, design and operations. Because of the high costs of and challenges in obtaining reliable O-D trip matrices from surveys or other direct sampling methods, estimating O-D trip tables from a readily available data source, traffic counts, provides an attractive, economical alternative. This project investigates one such an estimation method and implements it in a user-friendly software tool called Visual PFE TD. The developed O-D estimation tool can be used to obtain both static and dynamic O-D...

Field Operational Test of Tools for Facilitating Smart Travel Choices Through Real-Time Information

Zhou, Kun
Wang, Yanqiao
Li, Jingquan
Wachs, Marty
Walker, Joan
Meng, Huadong
Friedman, Jason
Zhang, Wei-Bin
2018

This report documents an effort to assess whetherintegrated multimodal real-time traveler information can encouragetravelers to consider transit as a more viable choice. Under the sponsorship of the California Department of Transportationand in partnership with the Los Angeles Metropolitan Transportation Authority,California PATH developed and field tested Trip2go --a suite of web-based and mobile-phone-based applications incorporating real-time transit and highway condition information. Both objective and surveys were collected to support statistical and modeling analyses to evaluate the...

Using Cooperative Adaptive Cruise Control (CACC) to Form High-Performance Vehicle Streams

Shladover, Steven E
Nowakowski, Christopher
Lu, Xiao-Yun
Hoogendoorn, Raymond
2014

This research identifies the operational concepts for managing cooperative adaptive cruise control (CACC) vehicle maneuvering and traffic flows. This includes approaches for grouping the CACC vehicles, ranging from ad-hoc to centrally coordinated strategies, and the incentives that could be used to facilitate the vehicle clustering, both operational and financial. These are particularly important at low market penetrations, when the CACC vehicles are likely to be widely separated. The dissolution of CACC strings is also discussed, since this needs to be done carefully to avoid adverse...

Stated And Reported Diversion To Public Transportation In Response To Congestion: Implications On The Benefits Of Multimodal ATIS

Khattak, Asad
Le Colletter, Emmanuel
1994

The objective of this study is to evaluate the potential benefits of a multimodal Advanced Traveler Information System (ATIS). The propensity of auto commuters to switch to public transportation in response to unexpected traffic congestion is investigated using a detailed survey undertaken in the Golden Gate Bridge corridor in 1993. A stated preference analysis tied to the situation for which the commuting behavior was reported is used to estimate the propensity of travelers to divert to transit under a multimodal ATIS.

Field Investigation of Advanced Vehicle Reidentification Techniques and Detector Technologies - Phase 2

Ritchie, Steven
Park, Seri
Oh, Cheol
Jeng, Shin-Ting
Tok, Andre
2005

This report presents the results of Phase 2 of a multi-year research effort on "Field Investigation of Advanced Vehicle Reidentification Techniques and Detector Technologies." Phase I of this research was conducted under PATH MOU 3008. Phases I and II of this research extended previous PATH research by the authors on MOU 336 "Section-Related Measures of Traffic System Performance: Prototype Field Implementation." Phase II of this research continued development, field investigation and assessment of the latest technologies available for traffic detection and surveillance, for collecting...

Development and Field Testing of Laser Photodiode Array-Based Vehicle Detection Systems

Cheng, Harry H.
Shaw, Ben
Palen, Joe
Wang, Zhaoqing
Feng, Ping
Nestinger, Stephen
Chen, Bo
2004

Over the past year we have researched the development of a network-based real-time laser-based nonintrusive field-deployable detection for the delineation of moving vehicles. The primary goal of this project is to develop a roadway detection system that can be used to gather reliable travel time data non-intrusively. A powerful Rabbit 3200, instead of multi-microchips, is used to control digitally controlled potentiometers (DCP), which adjust the gain of the sensors' signals. Utilizing digitally controlled potentiometers allow for quick and easy adjustment on the highway with only the need...

Developing Calibration Tools for Microscopic Traffic Simulation Final Report Part 1: Overview Methods and Guidelines on Project Scoping and Data Collection

Zhang, Michael
Ma, Jingtao
1998

The purpose of MOU-233 is to evaluate and test a low cost, short range radar sensor developed by Amerigon corporation through a subcontract with the University of Southern California. The radar is designed to be used as a ranging sensor for automatic vehicle following applications. It is intended to be mounted in the front of the vehicle and provide measurements of the distance between the front of the vehicle and the rear of any vehicle or object ahead within a maximum distance of 17 feet. The output of the radar as supplied by Amerigon, is a 32-bit binary code, using one bit to represent...

Dynamic Modeling and Simulation of Snowplow: Normal Operation and Icepack Impacts

Shou, Kun
Tomizuka, Masayoshi
Zhang, Wei-Bin
2000

Keywords: Dynamic Modeling, Snowplows, Multi-Unit Vehicles, Icepack Impacts, Braking Control, Steering Control.

Potential Benefits Of In-vehicle Information Systems In A Real Life Freeway Corridor Under Recurring And Incident-induced Congestion

Al-deek, Haitham
1988

Optimal use of existing transportation facilities has become a major priority in congested urban areas. Providing real-time in-vehicle traffic information to drivers is one possibility of achieving this goal. This report documents an initial attempt to ascertain the potential benefits of a real-time in-vehicle traffic information system under recurring and non-recurring congestion conditions.