Using RTD's Transit Vehicles to Develop Freeway Speed Maps for Colorado

Details

• Creators:
  Khan, Sarosh ; Kundu, Reema
• Corporate Creators:
  University of Colorado at Denver
• Corporate Contributors:
  Colorado. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Traffic speed
  • Advanced traveler information systems
  • Global Positioning System
  • Least squares method
  • Linear regression analysis
  • Sensors
  • Detectors
  • Freeways
  • Statistical analysis
  • Cameras
  More +
• Publication/ Report Number:
  CDOT-DTD-2004-9
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado. Department of Transportation
• Abstract:
  The objective of this research was to develop an algorithm to estimate traffic speed for freeway sections in real-time, as part of a traveler information system. The location data for RTD buses were collected for several months to develop and test an algorithm to estimate traffic speed. The plan is to provide travelers traffic speed information, updated every few minutes, for freeway sections. Typically, this type of reporting is based on the data collected by fixed sensors such as detectors, video cameras and other sensors located on the freeway. However, CDOT is unable to report traffic information for freeway sections without such infrastructure in place. On the other hand, RTD buses traversing these same sections are equipped with GPS receivers, the data from which can be utilized in estimating traffic speed. As part of this project, a statistical model to estimate traffic speed from bus speed, geometric characteristics of freeway and weather conditions was developed. The model was developed and tested based on data collected for a 13-mile section of the Interstate 25 (I-25) freeway. The model's performance was further examined based on data collected for an 11mile section of the Interstate 225 (I-225) freeway.
• Format:
  PDF
• Funding:
  90.46
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93310/dot_93310_DS1.pdf
• File Type:
  [PDF - 1.83 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:1f1e1aaff6f0e15976be0e48d3196f4673947405872580101022afc39ddb837e529a70b00b293f383caf9299860038197070141f26b030506a2919c0f8cdbe45