A Secure and Cost-Effective System for Acquiring Traffic Signal Data to Facilitate CAV Operations and Other Use Cases

Details

• Creators:
  Gowda, Manish Kumar Krishne ; Balmos, Andrew ; Fehr, Walt ; Ajagu, Richard ; Krogmeier, James V. ; Abbas, Montasir ; Labi, Samuel
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.) ; Virginia Tech. Department of Civil Engineering ; Purdue University. Center for Connected and Automated Transportation
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  • Cost effectiveness
  • Traffic signals
  • Data collection
  • Real time control
  • Dedicated short range communications
  • Connected vehicles
  • Automated vehicle control
  • Data communications
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Corporate Publisher:
  Center for Connected and Automated Transportation. Purdue University
• Abstract:
  Harvesting real-time data from traffic signal controllers supports connected and automated vehicle (CAV) operations. These benefits, however, require strong end-to-end security and a deployment model that adds minimal cost at each traffic intersection. In this paper, we present a secure, low-cost system that retrieves signal phase and timing (SPaT) data from traffic-signal controllers (TSCs). The system uses two microcontrollers connected through a unidirectional universal asynchronous receiver/transmitter (UART) link, establishing a “data-diode” channel. The first microcontroller interfaces with the TSC, extracts SPaT data, encodes it in base64, and sends it over the one-way UART link. The second microcontroller forwards the encoded data to a remote server via a cellular modem. The data-diode link enforces one-way communication, ensuring security of the TSC. Further, initial estimates suggest that the system achieves a 90% cost reduction per intersection compared to traditional dedicated short-range communication solutions, while assuring reliable data transmission.
• Format:
  PDF
• Funding:
  69A3551747105
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/90230/dot_90230_DS1.pdf
• File Type:
  [PDF - 1.18 MB]
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:f4ff20f09064b95a55680702db5d4d3681c1dc7356e87007b8f9275536e1c4dd557d4f442936b78cc170850fdf9dd317fc23f65675894c2743d647c2e897436d