Alexander York Bigazzi

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Capacity, demand, and vehicle based emissions reduction strategies are compared for several pollutants employing aggregate US congestion and vehicle fleet condition data. We find that congestion mitigation does not inevitably lead to reduced emissions; the net effect of mitigation depends on the balance of induced travel demand and increased vehicle(More)
Breath biomarkers were used to study uptake of traffic-related volatile organic compounds (VOCs) from urban bicycling. Breath analysis was selected because it is one of the least invasive methods to assess urban traveler exposure. Research hurdles that were overcome included considering that factors other than on-road exposure can influence concentrations(More)
Transportation Research Record: Journal of the Transportation Research Board, No. 2340, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 84–94. DOI: 10.3141/2340-10 Department of Civil and Environmental Engineering, Portland State University, P.O. Box 751, Portland, OR 97207-0751. Corresponding author: A. Y. Bigazzi,(More)
In order to assist planning efforts for air pollution-responsive dynamic traffic management (DTM) systems, this research assesses the accuracy of local emissions monitoring based on traffic data and models. The study quantifies the benefits of increased data resolution for short-term emissions estimates at a signalized intersection. The emissions estimates(More)
The health cost of on-road air pollution exposure is a component of traffic marginal costs that has not previously been assessed. The main objective of this paper is to introduce onroad pollution exposure as an externality of traffic, particularly important during traffic congestion when on-road pollution exposure is highest. Marginal private and external(More)
1 Given the commonly assumed association between traffic congestion and emissions, this paper 2 addresses the question of whether mobility-based performance measures are associated with 3 emissions performance measures. We address two facets of the roadway congestion-emissions 4 relationship by investigating: (a) whether congestion performance measures are(More)
speeds in each lane. PORTAL also includes incident and variable message sign (VMS) data since 1999, 1 year’s worth of stop level bus data and hourly and daily weather conditions in Portland from automated weather stations. The four weather measures are temperature, visibility, wind speed, and rainfall. From the basic sensor data PORTAL computes four other(More)