Surtrac for the People: Upgrading the Surtrac Pittsburgh Deployment to incorporate Pedestrian Friendly Extensions and Remote Monitoring Advances

The research team proposes to work with Rapid Flow Technologies, the commercial provider of the Surtrac smart signal system, to upgrade the Surtrac Pittsburgh deployment to incorporate the latest technology advances. These advances are encapsulated in the new Surtrac Alpine release (referred to below as Surtrac 2.0). Principal among the advances included in this release are (1) new coordination of traffic signals with pedestrian walk signals that will significantly increase pedestrian crossing time at intersections, (2) redesigned, web-based performance monitoring capabilities, and (3) enhanced predictive modeling of traffic flows from detector information, which improves overall traffic flow optimization. In addition to providing these new capabilities, installation of this new release will prepare the City for its planned expansion of the adaptive signal network; if they are truly interested in expanding multi-modal, real-time signal control more ubiquitously through the City, then there is really no alternative to Surtrac and this will be a prerequisite. Moreover, current prototyping efforts at CMU to integrate new pedestrian detection capabilities, to exploit vehicle-to-infrastructure communication for smart transit priority and other vehicle expediting services, and to provide pedestrians with disabilities technology for safe intersection crossing all require that the Pittsburgh Surtrac deployment be consolidated to run the latest release. The current deployment has grown incrementally over the past 5 years, and operates with different versions of the system in different sections of the deployment. The team proposes a four-month project to systematically install Surtrac 2.0 at all 50 intersections of the current Pittsburgh deployment. In addition, the team will address selected issues that have accumulated at various intersections, including an outstanding detection problem at Penn and Dallas Avenues that limits the systems ability to perceive traffic buildup on Dallas Avenue at various times of the day, and a malfunctioning communication radio at Morewood Avenue and Baum Boulevard. The team expects the new release to significantly extend pedestrian crossing time at intersections with little or no adverse impact on vehicle traffic flow efficiency.


  • English


  • Status: Completed
  • Funding: $77348
  • Contract Numbers:


  • Sponsor Organizations:

    Carnegie Mellon University

    Mobility 21 National UTC for Mobility of Goods and People

    Office of the Assistant Secretary for Research and Technology

    University Transportation Program
  • Managing Organizations:

    Carnegie Mellon University

    Mobility 21 National UTC for Mobility of Goods and People
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    Carnegie Mellon University

  • Principal Investigators:

    Smith, Stephen

  • Start Date: 20170801
  • Expected Completion Date: 20191231
  • Actual Completion Date: 20200127
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01677505
  • Record Type: Research project
  • Source Agency: National University Transportation Center for Improving Mobility (Mobility21)
  • Contract Numbers: 69A3551747111
  • Files: UTC, RiP
  • Created Date: Aug 7 2018 12:04PM