Data

Freeway Service Patrol (FSP) 1.1: The Analysis Software for the FSP Project

Petty, Karl
1995

This document is a reference manual for the fsp and xfsp programs. The fsp program is a software tool used to interrogate the data that was collected during the Freeway Service Patrol Evaluation Project. The purpose of the program is to perform diagnostics on the data, generate error reports, and make plots of various pieces of data. The xfsp program is a graphical user interface to the fsp program. It allows the user to create the runfile and the incident filter that the fsp proram requires by pointing and clicking on various butons and widgets with the mouse.

Aggregation of Direct and Indirect Positioning Sensors for Vehicle Guidance

Agogino, Alice
Chao, Susan
Wang, Jiangxin
Deng, Xinyan
2000

Advanced Vehicle Control Systems (AVCS) require large numbers of sensors for different levels within the control hierarchy. Whereas all sensors contain uncertainty to some degree, different sensors are particularly useful for specific environmental conditions. Therefore, sensor redundancy is essential to achieving high sensor data fidelity for use in real-world, non-ideal, unpredictable environments. In this work, a positioning sensor system, which includes Global Positioning System (GPS) receivers, a radar sensor, and a linear transducer is investigated. Positioning sensors provide...

Travel Behavior of Immigrant Groups in California

Handy, Susan, PhD
Blumenberg, Evelyn, PhD
Donahue, Moira
Lovejoy, Kristin
Rodier, Caroline, PhD
Shaheen, Susan, PhD
Shiki, Kimiko
Song, Lily
Tal, Gil
2009

California is the destination for over one-quarter of immigrants to the United States, and immigrants now make up over one-quarter of the state’s population, with nearly half of immigrants originating in Mexico. To ensure that transportation systems and services adequately meet the needs of recent immigrants, planners need a firm understanding of the travel behavior of immigrant groups. This paper reports on key findings from a three-phased study: (1) analysis of data on commute travel of California immigrants from the 1980, 1990, and 2000 Censuses; (2) focus groups with recent Mexican...

Red-Light-Running Collision Avoidance

Grembek, Offer
Zhou, Kun
Zhang, Wei-Bin
2009

Red light running (RLR) problem has been recognized as a significant safety problem in California as well as throughout the United States. This paper follows a two step process to develop enhanced signal timing models for possible reduction of RLR. In the first step, field data are collected with one-second resolution and discrete choice models are estimated to determine the significant influencing factors of RLR; in the second step, based on the findings from the first step, T7F software package as well as custom designed programs is used to find the enhanced signal timing plans that can...

Data Utilization At California Transportation Management Centers

Chan, Shirley
Chang, Elbert
Lin, Wei-hua
Skabardonis, Alexander
1998

This study looked at the operations and functions performed at the Caltrans Transportation Management Centers (TMC) with focus on the data sources, data processing, and performance measures. Recommendations are made for making greater use of archived real-time archived data. These include establishing a performance monitoring system, using the data to estimate performance measures, and providing procedures for data processing and dissemination.

Freeway Performance Measurement System (PeMS), Version 3 Phase II

Varaiya, Pravin
2004

This continuing PeMS project had four tasks: 1. Quantify the reduction in delay from optimum freeway operations; 2. Release travel time estimates to the public; 3. Training Caltrans staff in the use of PeMS; 4. Improve system robustness/maintenance. For task 1, we developed and implemented an algorithm that quantifes potential travel time reduction. The algorithm takes historical travel demand data from PeMS. It simulates the resulting traffic flow, based on an idealized ramp-metering algorithm, and calculates the resulting travel times on the freeway and waiting time at the ramps. As an...

Development of Bus Rapid Transit Information Clearinghouse

Miller, Mark A.
Carey, Graham
McNamara, Ian
Zimmerman, Sam
2006

This report documents the development of the bus rapid transit information clearinghouse, which is a web-based informational tool on bus rapid transit systems. It may be accessed at the following website address: http://path.berkeley.edu/informationclearinghouse/. This web-based tool provides users with a comprehensive and organized first-stop way of performing bus rapid transit-related research and investigations. The initial version of the BRT Information Clearinghouse has three primary elements consisting...

The Freeway Performance Measurement System (PeMS), PeMS 9.0: Final Report

Varaiya, Pravin
2009

Under development and operation since 1999, PeMS now is the de facto repository for all Caltrans fixed-location detector data. The PeMS 9.0 effort completed seven tasks: (1) Control Algorithm Support; (2) Integration of Census Data in PeMS; (3) Investigation of Fidelity of 3rd Party Detectors; (4) OD estimation algorithm based on the fusion of the FasTrak data and the ITS-sensors; (5) Incorporating speed measurements reported from the field; (6) Incorporation of New Photolog Format; and (7) Development of Diagnostic Routines for Rural Facilities.

Evaluate the Causes of Pedestrian and Bicyclist Traffic Fatalities and Injuries, and Establish Appropriate Countermeasures for Use in California

Arnold, Lindsay S.
Ragland, David R.
Yip, Harry
Cooper, Doug
MacLeod, Kara
Hennessey, Daniel
Mitman, Meghan
DuBose, Brooke
2010

The three primary objectives of this project were to: (1) conduct research on existing bicycle and pedestrian safety programs and guidelines in the U.S. and internationally, (2) obtain and analyze existing data related to pedestrian and bicycle safety in California, and (3) assist in developing methodologies for producing safety action plans, identifying and selecting projects, conducting education campaigns, and targeting enforcement campaigns. To meet these objectives, SafeTREC developed a set of resources and tools for use in California. These resources make information and data on...

Use of Los Angeles Freeway Service Patrol Vehicles as Probe Vehicles

Moore, II, James E.
Cho, Seongkil
Basu, Arup
Mezger, Daniel B.
2001

The Los Angeles County Metropolitan Transportation Authority/California Department of Transportation/California Highway Patrol Freeway Service Patrol (FSP) program is the largest in the nation, operating 144 service vehicles on 40 beats covering393 center-line freeway miles in Los Angeles County. The Caltrans District 7 Transportation Management Center (TMC) exercises FSP fleet control via the California Highway Patrol Computer Aided Dispatch (CAD) system. Each freeway service patrol truck is equipped with a Mobile Data Terminal (MDT), polled by the Automatic Vehicle Location (AVL) system...