Carnegie Mellon University

Surtrac 2.0: Upgrading adaptive signal networks

Surtrac 2.0

Working at the request of City of Pittsburgh DOMI to prepare the City for its planned expansion of the adaptive signal network, this project will upgrade the Surtrac Pittsburgh deployment to incorporate the latest technology advances (Surtrac 2.0).

Advances include: (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.  

Project Update

During the reporting period, the following progress has been made towards upgrading the Pittsburgh deployment of Surtrac to incorporate advances and new features (referred to as Surtrac 2.0) that have have resulted from the system's first commercial deployments in other cities:

(1) The Surtrac 2.0 system was extended to provide the capability to utilize tight master/slave coordination between closely spaced intersections, as was present in the original version of Surtrac that was deployed in Pittsburgh and is need at a few different locations in the Pittsburgh deployment (e.g., Centre/Penn and Kirkland/Penn; Centre/Highland and Spirit/Highland). This extension has been tested in simulation and is ready for field testing.

(2) The intersection at Centre and Cypress was upgraded to Surtrac 2.0 both (a) to develop an overall intersection installation process and (b) to provide a test intersection for integrating with Dedicated Short Range Communication (DSRC) radio capabilities for Vehicle/Pedestrian-to-Infrastructure communication.

(3) Several steps have been taken toward upgrading of the remaining intersections of the Pittsburgh deployment to Surtrac 2.0.

(4) Finally, although not identified as part of the proposed scope, we have also engaged with the Western Pennsylvania Regional Data Center (WPRDC) at the request of the City of Pittsburghs Department of Mobility and Infrastructure for purposes of including Surtrac traffic data. Initial information collected by the Surtrac system was communicated to WPRDC and development of an API for data exchange is in process.



Project Team

Stephen F. Smith
Research Professor, Robotics Institute, Carnegie Mellon University

Isaac Isukapati
Project Scientist, Robotics Institute, Carnegie Mellon University

Project Collaborators 

Western Pennsylvania Regional Data Center (WPRDC)