Travel Behavior

Assess the Trade-Offs between People Through-put and Level of Service Degradation in the Conversion of a Mixed Flow Lane to a Bus Only Lane on US 101

Li, Yue Irene
Li, Jing-Quan
Miller, Mark A.
Zhang, Wei-Bin
2001

This report proposes a generalized process for evaluating the ridership impact and traffic impact of a bus rapid transit system. The process proposed aims at providing such evaluation at the sketch planning stage and has a specific focus on two aspects -- the ridership forecast based on the implementation of various ITS technologies and the degradation of level of service that results from converting a traffic lane into exclusive bus lane for the implementation of a bus rapid transit system. The proposed process is tested on the Van Ness Blvd site in San Francisco, California. It is also...

Second Annual Symposium On Advanced Traffic Management Systems (ATMS) And Advanced Traveler Information Systems (ATIS), November 5, 1990

Haldors, Bruce
Bozzini, Anna
May, Adolf D.
1990

The purpose of the Symposium on Advanced Traffic Management Systems (ATMS) and Advanced Traveler Information Systems (ATIS) was to allow researchers involved in ATM/ATIS work to become familiar with other research in those areas in the state of California. This document provides a brief summary outlining the presentations made at the symposium.

An Evaluation of the Consequences and Effectiveness of Using Highway Changeable Message Signs for Safety Campaigns

Rodier, Caroline, PhD
Finson, Rachel S.
Lidicker, Jeffrey
Shaheen, Susan A., PhD
2010

Changeable Message Signs (CMSs), which are also called dynamic or variable message signs, are programmable signs used on highways worldwide to provide drivers with real-time information, such as traffic updates, roadwork warnings, and other traffic and safety-related information. CMSs allow motorists to take immediate action in response to information—to slow down or change routes, for example, which leads to safer driving conditions and less congestion. More recently, in California and throughout the U.S., CMSs have been used as part of public campaigns to promote roadway safety by...

TRACER: In-vehicle, GPS-based, Wireless Technology for Traffic Surveillance and Management

McNally, M. G.
Marca, J. E.
Rindt, C. R.
Koos, A. M.
2003

The fundamental principle of intelligent transportation systems is to match the complexity of travel demands with advanced supply-side analysis, evaluation, management, and control strategies. A fundamental limitation is the lack of basic knowledge of travel demands at the network level. Modeling and sensor technology is primarily limited to aggregate parameters or micro-simulations based on aggregate distributions of behavior. Global Positioning Systems (GPS) are one of several available technologies which allow individual vehicle trajectories to be recorded and analyzed. Potential...

The Mass Transit Needs Of A Non-driving Disabled Population

Golledge, Reginald G.
Costanzo, C. Michael
Marston, James R.
1996

This paper examines further characteristics of the activity patterns of blind and vision impaired non-driving populations previously discussed in PATH Database Reference No. The report begins with an exploration of the activity patterns of blind or vision impaired people, followed by an evaluation of the impact of non-driving on employability and movement potential of the disabled non-driving group. The results of a survey of blind and vision impaired users of public transit facilities are then examined. Travel behavior characteristics and travel modes are studied. Possible assistive...

Transportation Implications of Urban Containment Policies: Study of Largest 25 US Metropolitan Areas

Targa, F
Rodriguez, DA
Aytur, S
2006

Despite earlier attempts to evaluate the consequences of urban containment policy adoption, the transport implications of these policies have been overlooked. This paper examines the impact that containment policies have on population density and vehicle miles travelled per capita. An empirical analysis is conducted, relying on a fixed-effects model for panel data for the largest 25 metropolitan areas in the US during the 1982-94 time-period. Because the outcomes are endogenously related, instrumental variable regression is used to test hypotheses about the effect of the presence and...

Exploring Associations Between Physical Activity and Perceived and Objective Measures of the Built Environment

McGinn, AP
Evenson, KR
Herring, AH
Huston, SL
Rodriguez, DA
2007

The built environment may be responsible for making nonmotorized transportation inconvenient, resulting in declines in physical activity. However, few studies have assessed both the perceived and objectively measured environment in association with physical activity outcomes. The purpose of this study was to describe the associations between perceptions and objective measures of the built environment and their associations with leisure, walking, and transportation activity. Perception of the environment was assessed from responses to 1,270 telephone surveys conducted in Forsyth...

Monitoring The San Francisco Bay Area Freeway Network Using Probe Vehicles And Random Access Radio Channel

Linnartz, Jean-paul M. G.
Westerman, Marcel
Hamerslag, Rudi
1994

In this report, the authors describe a method of collecting real-time traffic data from probe vehicles automatically sending traffic reports to one or m ore base stations, connected to a traffic center by a wired communications network. Analyzing and computing road traffic and message traffic flows in the San Francisco Bay Area, the authors study several multi-disciplinary aspects of this data collection technique. The results presented in this report reveal that random access (ALOHA) transmission of traffic messages is a (spectrum) efficient, inexpensive and flexible method for collecting...

Development and Assessment of Selected Mobility Applications for VII: Principal Findings

Shladover, Steven E
Lu, Xiao-Yun
Nowakowski, Christopher
2011

This project has shown how connected vehicle systems, based on vehicle-vehicle and vehicle-infrastructure communication and coordination, can support the development of mobility-enhancing applications with the potential to transform the performance of the road transportation system. Three separate mobility-enhancing applications were developed, simulated, and tested, and their expected mobility benefits were estimated using simulations. Cooperative adaptive cruise control was shown to have a high potential for user acceptance, and when applied at the gap settings chosen by representative...

California Intersection Decision Support: A Driver-Centered Approach to Left-Turn Collision Avoidance System Design

Bougler, Bénédicte
Cody, Delphine
Nowakowski, Christopher
2008

Currently, Federal and State governments are partnering with private industries and academia institutions to pursue the deployment of intersection decision support (IDS) and cooperative intersection collision avoidance systems (CICAS), which seek to combine infrastructure-based and vehicle-based functions to provide optimal solutions for roadway users. The overall (IDS) research plan was constructed to explore the requirements, tradeoffs assessment, and technology investigations necessary to define a Cooperative Intersection Collision Avoidance System. This report is the third report on...