Integrated Multimodal Transportation, Air Quality, and Livability Corridor Study Phase II

Principal Investigator

Miguel Figliozzi, Portland State University Civil & Environmental Engineering

Co-Investigator(s)

Christopher Monsere, Portland State University
Linda George, Portland State University

Final Report

OTREC-RR-13-07 Evaluation of the Performance of the Sydney Coordinated Adaptive Traffic System (SCATS) on Powell Boulevard in Portland, OR. [January 2014]

Summary

The interactions between traffic, transit, pedestrians, greenhouse gas (GHG) emissions, fuel consumption, and unhealthy emissions exposure are currently under study in a section of Powell Boulevard (PB). This Boulevard is a multimodal urban corridor connecting highway US-26 to and through Portland, Oregon. The corridor is highly congested during morning and evening peak traffic hours. Traffic performance and associated vehicular emissions can be significantly improved using advanced traffic control systems. One such adaptive system (Sydney Coordinated Adaptive Traffic System or SCATS) will be deployed in the summer of 2011 on the Powell Boulevard corridor. SCATS employs adaptive traffic control in…

The interactions between traffic, transit, pedestrians, greenhouse gas (GHG) emissions, fuel consumption, and unhealthy emissions exposure are currently under study in a section of Powell Boulevard (PB). This Boulevard is a multimodal urban corridor connecting highway US-26 to and through Portland, Oregon. The corridor is highly congested during morning and evening peak traffic hours. Traffic performance and associated vehicular emissions can be significantly improved using advanced traffic control systems. One such adaptive system (Sydney Coordinated Adaptive Traffic System or SCATS) will be deployed in the summer of 2011 on the Powell Boulevard corridor. SCATS employs adaptive traffic control in response to real-time corridor traffic conditions to improve traffic flow, reduce the number of vehicle stops, and enhance travel reliability for automobiles and transit fleets. The PB corridor incorporates transit signal priority (TSP) to further improve transit service reliability. To the best of our knowledge, no research has jointly studied SCATS and transit signal priority performance or the impact of SCATS on pedestrian, bicyclist, and transit users' exposure to motor vehicle emissions. This proposal addresses this research gap by simultaneously measuring, integrating, and analyzing (a) traffic intensity and composition, (b) GHG and particulate emissions, (c) SCATS and TSP performance, (d) pedestrian, transit user, and bicyclist exposure to air pollution, and (e) the impact of a specific land-use (Cleveland High School) on automobile trip generation and associated traffic congestion and emissions. The first phase of this research began five months ago evaluating the PB corridor performance before SCATS implementation. The second phase of this research will evaluate the PB corridor performance after SCATS implementation (which is scheduled for summer 2011). The unique contribution of this research is to provide a detailed and integrated view of a multimodal urban transportation corridor in terms of traffic and air quality performance. Close cooperation with the City of Portland (see attached letter) has brought about the opportunity to install two permanent state-of-the-art air quality and traffic data collection stations at two key intersections of the PB corridor. The permanent data collection stations will be installed: (1) at an intersection adjacent to Cleveland High School and Powell City Park and (2) at the intersection of two major arterials in southeast Portland (SE 39th and Powell Boulevard). The permanent data collection stations will provide invaluable data to model short-term air quality trends (e.g. seasonal or daily variations), long-term air quality trends and health impacts in terms of traffic characteristics and composition (e.g. changes in automobile fleet composition, fuel efficiency, or electric vehicle market penetration).

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Project Details

Year: 2011
Project Cost: $150,000
Project Status: Completed
Start Date: October 1, 2011
End Date: March 31, 2013
Theme:
TRB RiP: 28516

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Additional Info

Publications

  • Albright, E., Figliozzi, M., Factors Influencing Effectiveness of Transit Signal Priority and Late-Bus Recovery at Signalized Intersections, Transportation Research Record 2311, pp 186-197 Factors Influencing Effectiveness of Transit Signal Priority and Late-Bus Recovery at Signalized Intersections . Type: Peer-reviewed journal.
  • Moore, A., Figliozzi, M., Monsere, C., Bus Stop Air Quality: An Empirical Analysis of Exposure to Particulate Matter at Bus Stop Shelters, 2012, Transportation Research Record 2270, pp 76-86. Bus Stop Air Quality: An Empirical Analysis of Exposure to Particulate Matter at Bus Stop Shelters. Type: Peer-reviewed journal.
  • Slavin, C., Figliozzi, M., The Impact of Traffic Signal Timing on Sidewalk Level Particulate Matter Concentrations, Forthcoming 2013 Transportation Research Record. The Impact of Traffic Signal Timing on Sidewalk Level Particulate Matter Concentrations . Type: Peer-reviewed journal.
  • Moore, A., Figliozzi, M., A Statistical Study of the Variables Associated with Particulate Matter Exposure Levels at Bus Shelters, Forthcoming 2013 Transportation Research Record. A Statistical Study of the Variables Associated with Particulate Matter Exposure Levels at Bus Shelters. Type: Peer-reviewed journal.
  • Slavin, C., Feng, W., Figliozzi, M., Koonce, P., A Statistical Study of the Impacts of SCATS Adaptive Traffic Signal Control on Traffic and Transit Performance, Forthcoming 2013 Transportation Research Record. A Statistical Study of the Impacts of SCATS Adaptive Traffic Signal Control on Traffic and Transit Performance . Type: Peer-reviewed journal.

Presentations

  • A Statistical Study of the Impacts of SCATS Adaptive Traffic Signal Control on Traffic and Transit Performance , 2013-01-15, DC.
  • A Statistical Study of the Variables Associated with Particulate Matter Exposure Levels at Bus Shelters, 2013-01-15, DC.
  • The Impact of Traffic Signal Timing on Sidewalk Level Particulate Matter Concentrations , 2013-01-15, DC.
  • Bus Stop Air Quality: An Empirical Analysis of Exposure to Particulate Matter at Bus Stop Shelters, 2012-01-17, DC.
  • Factors Influencing Effectiveness of Transit Signal Priority and Late-Bus Recovery at Signalized Intersections , 2012-01-17, .

OTREC by the Numbers

  • Total value of projects funded: $12.2 million
  • Number of projects funded: 153
  • Number of faculty partners: 98
  • Number of external partners participating in OTREC: 46

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