Identifying chronic errors at freeway loop detectors- splashover, pulse breakup, and sensitivity settings.

Details

• Alternative Title:
  Diagnosing chronic errors in freeway loop detectors from existing field hardware.
• Creators:
  Coifman, Benjamin ; Lee, Ho
• Corporate Creators:
  Ohio State University. Department of Civil and Environmental Engineering and Geodetic Science
• Subject/TRT Terms:
  • Vehicle detectors
  • Mathematical models
  • Motor vehicles
  • Remote sensing
  • loop detectors
  • trt
• Publication/ Report Number:
  CA10-0978
• Resource Type:
  Tech Report
• Geographical Coverage:
  California
• Corporate Publisher:
  California. Dept. of Transportation. Division of Research and Innovation
• Abstract:
  Traffic Management applications such as ramp metering, incident detection, travel time prediction, and vehicle ; classification greatly depend on the accuracy of data collected from inductive loop detectors, but these data are ; prone to various errors caused by hardware and software problems. The impact of these errors will propagate to ; the subsequent measurements of flow, occupancy, and speed and can end up affecting traffic control decisions ; and traveler information. In an effort to improve the quality of loop detector data, this research developed ; algorithms to automatically identify two types of detector errors that are difficult to diagnose in the field: ; splashover, the false detection in one lane of a vehicle from an adjacent lane; and pulse breakup, when a single ; vehicle produces two or more pulses in its lane of travel. While the focus of this study is loop detectors, the ; present work is likely applicable to emerging detectors seeking to replace loop detectors using wayside mounted ; sensors. Most of these detectors emulate the operation of loop detectors, so, while the mechanism of ; splashover and pulse breakup differs across the different detection technologies, its manifestation should be ; similar in the vehicle actuations.
  More +
• Format:
  PDF
• Funding:
  IA 65A0231
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27564/dot_27564_DS1.pdf
• File Type:
  [PDF - 5.21 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ffb4b959bb122e80b6668b35fb4f75db5d5d82186efe3f43e5afda6a3eaa7c45