Date of Award

2014

Document Type

Project

Degree Name

Master of Science (M.S.) in Civil & Environmental Engineering

Department

Civil and Environmental Engineering

First Advisor

Christopher M. Monsere

Subjects

Transportation planning, Adaptive routing, freight network assignment -- Mathematical models, Freight system performance

Subject Categories

Civil and Environmental Engineering

DOI

10.15760/CEEMP.31

Abstract

Given the importance of over growing freight transportation system worldwide, engineers and planners are faced with the challenge of improving freight service in urban area using low cost measure. Truck Signal Priority is one of the strategy that can be used to improve operational efficiency with enhance safety benefits (red light running) of freight service, without major capital investment. In light to this interest this study focus on evaluating the impacts of freight signal priority on a high truck density intersection like N Columbia Blvd and NE Martin Luther King Jr. Blvd. Using a simulation tool, VISSIM, these impacts were assessed considering a eleven second of green time extension for priority strategy.

Results from this simulation analysis indicated that the given priority from the green time extension strategy in higher truck traffic approach can ensure service reliability, reduce red light running, and improve safety and smoother operations with little to no impact on other vehicular traffic. Overall travel delay and stop delay has improved 13% and 20% for truck traffic, while minimum to no impact on travel delay for other vehicles in the approach. Priority also improved carbon emission and reduced pavement damage by reducing trucks stop 9% to 16% at major truck moving direction, while minimum or no impact to all vehicles stops in that approach.

This study can serve as groundwork for the evaluation of truck signal priority for agencies and researcher, future research can build upon this effort. Areas identified for future research include the provision of priority on truck leading approach on a coordinated signal system network; testing other priority strategies; combination of emergency preemption and freight preemption; monetary and environmental benefit from priority received network.

Comments

A research project report submitted in partial fulfillment of the requirement for the degree of Master of Science in Civil and Environmental Engineering

Persistent Identifier

http://archives.pdx.edu/ds/psu/12502

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