PATH

Institutional Aspects of Bus Rapid Transit – A Macroscopic Examination

Miller, Mark A.
Buckley, Stephen M.
2000

This report investigated the institutional aspects of Bus Rapid Transit through a macroscopic examination of relevant issues ascertained through a literature review, a series of project team brainstorming meetings, and input from members of the Federal Transit Administration’s Bus Rapid Transit staff. The literature review provided insight into the history of Bus Rapid Transit concepts ranging from very early research in the United States in the late 1950s, continuing with dual mode systems and early busways in the 1960s and 1970s, international experiences in Latin America and Canada, and...

Productivity Benefits and Cost Efficiencies from ITS Applications to Public Transit: The Evaluation of AVL

Gillen, David
Chang, Elva
Johnson, Doug
2000

The research reported in this document uses Total Factor Productivity (TFP) techniques, with which we develop measures of productivity performance of public transit systems of varying sizes and locations, and use this baseline to examine the potential contribution of alternative ITS applications. TFP aggregates outputs on the basis of their revenue contribution and inputs on the basis of their relative importance to total costs to calculate the overall firm productivity as a function of these quantities. The focus of this research was how the opportunities for improving efficiency via AVL...

Ideal Dynamic User-Optimal Route Choice: A Link-Based Variational Inequality Formulation

Ran, Bin
Boyce, David E.
1995

The ideal dynamic user-optimal (DUO) route choice problem is to determine vehicle flows on each link at each instant of time resulting from drivers using actual minimal-time routes. Actual route time is the travel time incurred while driving along the route. In a previous paper, we presented a route-based optimal control model for the ideal DUO route choice problem. However, this model is not appropriate for largescale transportation networks because some degree of route enumeration is necessary to solve the model. In this paper, we first present the traffic network constraints and link-...

An Enhancement to Speed Estimation with Single Loops

Lin, Wei-Hua
Dahlgren, Joy
Huo, Hong
2003

Traffic data from single loop detectors are one of the dominant data sources widely used in many traffic operation centers and traveler information systems. Speed estimation from single loop detectors is mainly based on occupancy data, a conversion factor from occupancy to density (which is related to vehicle length), and the assumed relationship between flow, speed, and density. This paper investigates the discrepancy between the speed estimated with single loops and the speed measured directly from double loops. It was found that the inaccuracy of speed estimation with single loops is...

AHS Deployment: A Preliminary Assessment of Uncertainties

Hall, Randolph W.
Tsao, H.-S. Jacob
1994

This paper provides a preliminary assessment of uncertainties, both technical and institutional, associated with the deployment of Automated Highway Systems (AHS). Seven issues are addressed, concerning whether: (1) People use AHS, ( 2 ) Auto makers manufacture equipped vehicles, (3) Government builds AHS roadways, (4)Highways can evolve, ( 5 ) Interest groups do not obstruct, (6) Performance is adequate, and (7) Technology is feasible. For each issue, a table is provided that lists some of the more critical uncertainties.

Advanced Coordinated Traffic Responsive Ramp Metering Strategies

Bogenberger, Klaus
May, Adolf D.
1999

This report introduces different coordinated traffic responsive ramp control algorithms, implemented or not-implemented, but based on promising new mathematical techniques. A total of 17 different ramp metering approaches is described. For the already implemented algorithms, the historical background, the network, the algorithm and the main references are described. The proposed ramp control approaches are briefly described and the literature references are included. Two possible directions of ramp metering for the future are qualitatively described. Based on the literature review, online...

Evaluation of UC Davis Long-Range Transportation, Land-Use, and Housing Plans: Examining the Potential for Innovative Mobility Pilot Projects

Finson, Rachel S.
Shaheen, Susan A.
2001

At present, the City of Davis, surrounding communities, and the UC Davis campus are struggling with many of the same transportation problems that plague larger urban centers including increasing traffic, limited parking, and challenges to effective operation of the public transit system. The campus is expecting to grow by 6,000 students in the next ten years (plus approximately 3,000 faculty and staff) and is developing a Long-Range Development Plan (LRDP) that will serve to guide this growth. This plan will include housing, traffic control, parking, alternative transportation modes, and...

Adaptive Signal Control System with On-line Performance Measure for Single Intersection

Liu, Henry X.
Oh, Jun-Seok
Recker, Will
2002

This paper introduces an adaptive signal control system utilizing an on-line signal performance measure. Unlike conventional signal control systems, the proposed method employs real-time delay estimation and an on-line signal timing update algorithm. As a signal performance measure, intersection delay for each phase is measured in real-time via an advanced surveillance system that re-identifies individual vehicles both at upstream and downstream stations using vehicle waveforms obtained from advanced inductive loop detectors. In each cycle, the signal timing plan is optimized based on the...

Vehicle Lateral Warning, Guidance and Control Based on Magnetic Markers: PATH Report of AHSRA Smart Cruise 21 Proving Tests

Tan, Han-Shue
Bougler, Bndicte
2001

This report details the PATH proving test results during the period of October 6 to December 1, 2000 on the test track of the Public Works Research Institute (PWRI) of the Ministry of Construction in Tsukuba City, Japan. This work is related to the "Attachment 5: System Evaluation by Proving Test, Section 2.2 Evaluation by Proving Test" to the "Implementation Plan for Advanced Cruise-Assist Highway System Technical Research Development for FY2000" with respect to the "Entrusted Study" entrusted in FY2000 by the "Public Works Research Institute of the Ministry of Construction" to the "...

Towards a Technology Assessment of Highway Navigation and Route Guidance

Kanafani, Adib
1987

This paper is intended as a first look at the required assessment of technology. It is preliminary in the sense that it attempts to identify the issues and to identify some aspects of technology assessment that are needed to deal with them. It's aim is to raise some of the fundamental questions that arise in connection with the evaluation of this technology, and to suggest some further work for dealing with them. A more extensive research plan for looking at the various aspects of automobile navigation is to be found in Gosling [1988].