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:
  Loop Detectors Mathematical Models Motor Vehicles Remote Sensing Trt Vehicle Detectors
• 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.
  
  
• Format:
  PDF
• Funding:
  IA 65A0231
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ffb4b959bb122e80b6668b35fb4f75db5d5d82186efe3f43e5afda6a3eaa7c45
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27564/dot_27564_DS1.pdf
• File Type:
  [PDF - 5.21 MB ]