PATH

The Costs And Benefits Of Telecommuting: An Evaluation Of Macro-scale Literature

Shafizadeh, K.
Niemeier, D.
Mokhtarian, P.
Salomon, I.
1998

This report presents a literature review designed to synthesize and assess previous large-scale evaluations of telecommuting. A concept framework is first proposed to organize the inputs and outputs of a macro-scale telecommuting benefit-cost analysis. Four federal and regional reports are studied in terms of methodology, assumptions, economic approach, and major findings. The review identifies common inputs and discusses the critical assumptions that routinely affect the results. The report concludes with some major findings and an analysis of the economic approaches.

Variable Message Signs and Link Flow Evaluation: A Case Study of the Paris Region

Yim, Youngbin
Lygeros, John
1995

SIRIUS (Systeme d'Information Routiere Intelligible aux Usagers) is the largest urban field operational test of the advanced traveler information and automated traffic management system in Europe. With variable message signs, SIRIUS has been in operation in the Paris region since December 1992. This study is a preliminary investigation of the effectiveness of the SIRIUS system in traffic management.The concern of the paper is the extent to which drivers respond to real-time traffic information and the consequential changes in link flow under SIRIUS. Time-series traffic data were analyzed...

Design Of An Extended Architecture For Degraded Modes Of Operation Of AHS

Lygeros, John
Godbole, Datta N.
Broucke, Mireille E.
1995

In this paper, the authors propose a hierarchical control architecture for dealing with faults an adverse environmental conditions on an Automated Highway System (AHS). The design builds on a previously designed control architecture that works under normal conditions of operation. The faults that are considered in the design are classified according to capabilities remaining on the vehicle or roadside after the fault has occurred. Information about these capabilities is used by the supervisors in each of the layers to select appropriate control strategies. The extended control strategies...

Public Transit Use By Non-driving Disabled Persons: The Case Of The Blind And Vision Impaired

Golledge, R.
Costanzo, C. M.
Martson, J.
1996

This paper examines characteristics of the activity patterns of blind and vision impaired non-driving populations. The employability and movement potential of the disabled non-driving group is evaluated. Survey results of impaired public transit users are reported. Possible assistive technologies to aid in making travel decisions and undertaking travel are discussed. This paper examines characteristics of the activity patterns of blind and vision impaired non-driving populations. The employability and movement potential of the disabled non-driving group is evaluated. Survey results of...

A Survey of Value Added Resellers: Private Sector Views on Advanced Traveler Information Markets

Ygnace, Jean-Luc
Yim, Youngbin
Weissenberger, Stein
1997

This is a case study of publidprivate partnerships for the implementation of TravInfo, an advanced traveler information system for the San Francisco Bay Area. The purpose of the paper is to illuminate private sector views on how the public/private partnership should work in order to successfilly implement TravInfo. This paper reports on the analysis of a series of interviews conducted among those private sector firms who are participating in the federal Field Operational Test of TravInfo. The firms interviewed range from product manufacturers to service providers, including traffic...

Coding Of Road Information For Automated Highways

Guldner, J.
Patwardhan, S.
Tan, H.
Zhang, W.
1997

This paper discusses coding of road information in a lateral reference system using magnetic markers designed for Automated Highway Systems ( AHS). The coding is utilized to communicate road information such as up- coming road geometry or lane merges/diverges from the roadway infrastructure to AHS vehicles. The work presented here is based on experiences with the preparation of the I-15 test track near San Diego, CA, for the National AHS Consortium demonstration in 1997. Information about road features was encoded into the magnets used as a lateral reference system for automatic steering...

Design, Modeling And Control Of Steering And Braking For An Urban Electric Vehicle

Maciua, Dragos
1996

This report describes research which involved the design modification, modeling and control of automatic steering and braking systems for an urban electric vehicle. The vehicle is equipped with four-wheel independent drive, four-wheel independent braking and four-wheel steering. Control algorithms were developed for steering and braking. Simulation results show the feasibility of the algorithms.

Trav Info Evaluation (Technology Element ) Traveler Information Center (TIC) Study: System Reliability and Communications Interface

Miller, Mark
Loukakos, Dimitri
1998

TravInfo is a Field Operational Test of advanced traveler information systems for the San Francisco Bay Area, sponsored by the Federal Highway Administration (FHWA). The project involves a public/private partnership which seeks to compile, integrate and broadly disseminate timely and accurate multi-modal traveler information through commercial products and services. The public sector component centers on the Traveler Information Center (TIC), which collects and integrates both static and dynamic traveler information. The TIC began operations in September 1996 and will operate as an FOT...

Freeway Detector Data Analysis For Simulation Of The Santa Monica Freeway - Initial Investigations

Bloomberg, Loren D.
Bacon, Vinton W., Jr.
May, Adolf D.
1993

This report provides an analysis of vehicle detector data on the Santa Monica Freeway in Los Angeles, Calif. It was found that approximately 32 percent of the mainline freeway detectors appeared to give reasonable results. The report suggests that Caltrans District 07 staff make efforts towards increasing the number of detectors which give reliable information so that an evaluation and simulation of the Smart Corridor on the Santa Monica Freeway may be undertaken. This report was revised and re-issued as UCB-ITS-PWP-93-10 (PATH Database record #4779)

Initial Scoping of Bay Area Smart Mobility Corridors and ITS World Congress

Shaheen, Susan
Finson, Rachel S.
McCormick, Cynthia
2004

The Innovative Corridors Initiative (ICI) is a multi-year project designed to encourage the early deployment of innovative technologies for Intelligent Transportation Systems (ITS) in California. ITS technologies are defined through a broad array of information and vehicle control technologies that are designed to improve traffic and transit management including safety, user choice, congestion, and incident response. For over a decade, ITS technologies have been gaining acceptance and are now utilized in every major metropolitan area in the United States to enhance transportation system...