Field test implementation of queue control : final report.

Details

• Creators:
  Horowitz, Roberto ; Varaiya, Pravin ; Sanchez, Rene O.
• Corporate Creators:
  University of California PATH Program
• Subject/TRT Terms:
  • Ramp metering (Traffic engineering)
  • California
  • Ramp-freeway junctions
  • East Bay
  • Management
• Publication/ Report Number:
  CA11-2055
• Resource Type:
  Tech Report
• Geographical Coverage:
  California
• Corporate Publisher:
  California. Dept. of Transportation. Division of Research and Innovation
• Abstract:
  A major challenge for implementing queue control has been to accurately estimate on-ramp queue lengths, particularly during saturated onramp ; conditions, when the vehicle queue extends around or beyond the ramp entrance. The main outcome of the research was the development ; and field test verification of an accurate on-ramp queue length estimation algorithm based on vehicle re-identification, which performs ; reliably even under severe on-ramp saturated conditions. Four different queue estimation methodologies were studied using wireless magnetic ; sensors installed on a single lane loop on-ramp. Queue length estimation based on (i) occupancy measurements at ramp entrance, (ii) vehicle ; counts at on-ramp entrance and exit, (iii) speed measurements at ramp entrance, and (iv) vehicle re-identification were considered. These ; queue estimation methods were evaluated using available raw and processed sensor data, retrieved from the test site through mobile data ; communication and downloaded from a server. The accuracy and reliability of the queue estimation methods were studied using ground truth ; data obtained from video.
• Format:
  PDF
• Funding:
  65A0320
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27570/dot_27570_DS1.pdf
• File Type:
  [PDF - 2.83 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:daaa68ec654c6a8c702f49fa445b9ad3e895b7541d795b8fa9c35febd52b6e02