Travel Behavior

Evaluation of PeMS to Improve the Congestion Monitoring Program

Kwon, Jaimyoung
McCullough, Bill
Petty, Karl
Varaiya, Pravin
2007

The highway congestion monitoring program (HICOMP) report is based on data from tach vehicle runs or PeMS. Research under TO 5319 compares the accuracy and cost of these two alternatives. The detailed studies described in the report lead to the following conclusions and suggestions for follow-on work:1. In freeway sections with good quality detectors spaced at most one-half mile apart, PeMS-based estimates of the magnitude, extent and duration of congestion are incomparably more accurate than those based on tach vehicle runs.2. Because at most four days of tach run data are used to...

TravInfo Evaluation: Institutional Element Phase 1 Results

Hall, Randolph
Yim, Y. B.
Pfeifle, Brian
Weissenberger, Stein
1995

The TravInfo project aims to develop a multi-modal traveler information system for the San Francisco Bay Area, developing a partnership between the public and private sectors. This report presents the results of the first wave of institutional interviews, as part of the TravInfo evaluation.

Travel, Emissions, and Consumer Benefits of Advanced Transit Technologies in the Sacramento Region

Johnston, R.
Rodier, C.
1996

The purpose of this project was to examine the potential travel effects, emissions, and consumer welfare benefits of advanced transit technologies. These technologies included advanced transit information, demand responsive transit, and personal rapid transit. The Sacramento Regional Travel Demand model (SACMET 95) was used to simulate the travel effects. Consumer welfare evaluation was accomplished by applying the Small-Rosen model to SACMET. Five advanced transit scenarios for the Sacramento region in the year 2015 were examined. It was found that the advanced transit technologies, which...

TravInfo Evaluation Plan

Yim, Youngbin
Khattak, Asad
Miller, Mark
Hall, Randolf
1993

This document presents an evaluation plan for the TravInfo project, a field operational test of a centralized database in the San Francisco Bay Area. The TravInfo Evaluation Plan is prepared in accordance with the Mitre guidelines adopted by the Federal Highway Administration (FHWA) for IVHS Operational Test Evaluation Plans. The report consists of five major sections: introduction, traveler response component, institutional component, technology assessment, and system evaluation.

TravInfo Evaluation: The Target Study Phase 1 Results

Koo, Ronald
Yim, Younbin
Hall, Randolph
1998

This paper discusses how traffic information is obtained and how the congestion of a major freeway affects travel behavior. Immediately following two congestion-causing major highway incidents south of San Francisco, telephone surveys were conducted of commuters who utilize the affected corridor of highway. The incidents took place two weeks apart on the same corridor of US-101, the first affecting southbound traffic and the second affecting northbound traffic. The travel behavior of commuters before and during their commute at the time of each incident was determined, including how they...

TravInfo Evaluation: Value Added Reseller (VAR) Study Phase 1 Results

Loukakos, D.
Hall, R.
Weissenberger, S.
Yim, Y. B.
1996

TravInfo is a Field Operational Test (FOT) in advanced traveler information systems (ATIS) 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. This working paper is part of the Technology Element of the TravInfo evaluation. It presents the results of the "before" wave of the Value-Added-Reseller (VAR) study, in which 17 TravInfo registered VARs and 16 non-...

Travinfo Field Operational Test: Work Plan for the Target, Network, and Value Added Reseller (VAR) Customer Studies

Yim, Y. B.
Hall, Randoph
Skabardonis, Alex
Tam, Robert
Weissenberger, Stein
1997

This report contains detailed work plans for the following evaluation tasks associated with the TravInfo evaluation study. These include: the target, Value Added Reseller (VAR) customer studies, and the network performance evaluation. The target study focuses on a high impact Bay Area corridor to evaluate TravInfo impacts or benefits to Bay Area travelers. The network performance evaluation simulates the road conditions in that corridor to estimate TravInfo impacts at the aggregate level. The VAR customer study provides information on those consumers who actually purchase and use Advanced...

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.

Transit-Based Smart Parking in the San Francisco Bay Area: An Assessment of User Demand and Behavioral Effects

Rodier, Caroline J.
Shaheen, Susan A.
Eaken, Amanda M.
2004

This paper presents early findings from an application of advanced parking technologies to increase effective parking capacity at a transit station during the first half of 2004 in the San Francisco Bay Area (CA). It begins with an extensive review of the literature related to transit-based smart parking management systems to illustrate the range of system configurations and their potential travel, economic, and environmental effects. Two important conclusions from this review are: (1) lack of parking spaces at transit stations may be a significant constraint to transit use and (2) pre-...

Transient Vehicle Aerodynamics in Four-Car Platoons

Chen, A. L.
Savas, Omer
Hedrick, Karl
1997

The vehicles in a platoon will experience transient aerodynamic forces as vehicles leave and join the platoon at various locations. A platoon of scale vehicle models is placed in a wind tunnel and measurements are made of the transient forces and moments as one of the vehicles is moved into and out of the platoon. The results from the wind tunnel experiments will allow the computer vehicle control algorithms to better predict the transient aerodynamics the vehicles in the platoon will encounter during leaving and joining maneuvers. \par Since a lane change (either leaving or joining a...