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Urban Studies and Planning Commons

Open Access. Powered by Scholars. Published by Universities.®

Portland State University

Transportation

2014

Traffic congestion -- Environmental aspects

Articles 1 - 3 of 3

Full-Text Articles in Urban Studies and Planning

Effect Of Light-Rail Transit On Traffic In A Travel Corridor, Reid Ewing, Guang Tian, Allison Spain Jun 2014

Effect Of Light-Rail Transit On Traffic In A Travel Corridor, Reid Ewing, Guang Tian, Allison Spain

TREC Final Reports

This study seeks to quantify the effect of the University TRAX light-rail line on traffic near the University of Utah, providing quantitative data that can be used to shape future transportation policies aimed at reducing traffic congestion, energy consumption, air pollution, greenhouse gas emissions, and parking costs. Travel demand models have long been used to estimate and evaluate the effects of transportation improvements, like LRT investments, on network travel flows and times as part of long-range planning studies, using four-step models or more sophisticated urban simulation studies. However, these are usually ex ante studies. Few ex post evaluations have been …


Modeling The Impact Of Traffic Conditions On The Variability Of Mid-Block Roadside Pm2.5 On An Urban Arterial, Adam Moore Jan 2014

Modeling The Impact Of Traffic Conditions On The Variability Of Mid-Block Roadside Pm2.5 On An Urban Arterial, Adam Moore

PSU Transportation Seminars

Modeling Impact of Traffic Conditions on Variability of Midblock Roadside Fine Particulate Matter Concentrations on an Urban Arterial: This paper presents an innovative modeling of fine particulate matter (PM2.5) concentrations as a function of very high resolution meteorological and traffic data. Peak period measurements were taken at a mid-block roadside location on an urban arterial commuter roadway. To capture the impact of dynamic traffic conditions, data were analyzed at 10-second intervals, with substantially higher resolution than typical roadside air quality study designs. Particular attention was paid to changes in traffic conditions, including fleet mix, queuing and vehicle platooning over the …


Identficaton And Characterization Of Pollutant Hot Spots Integratng Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell, Miguel Figliozzi Jan 2014

Identficaton And Characterization Of Pollutant Hot Spots Integratng Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell, Miguel Figliozzi

PSU Transportation Seminars

Identification and Characterization of PM2.5 and VOC Hot Spots on Arterial Corridor by Integrating Probe Vehicle, Traffic, and Land Use Data: The purpose of this study is to explore the use of integrated probe vehicle, traffic and land use data to identify and characterize fine particulate matter (PM2.5) and volatile organic compound (VOC) hot spot locations on urban arterial corridors. An emission hot spot is defined as a fixed location along a corridor in which the mean pollutant concentrations are consistently above the 85th percentile of pollutant concentrations when considering all other locations along the corridor during the same time …