Improved intersection operations during detector failures.

Details

• Creators:
  Sunkari, Srinivasa ; Songchitruksa, Praprut ; Charara, Hassan ; Zeng, Xiaosi
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Intersections
  • Traffic signals
  • Roads--Interchanges and intersections--Texas--Safety measures
  • Traffic signs and signals--Texas--Safety measures
• Publication/ Report Number:
  FHWA/TX-10/0-6029-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Technical report; Sept. 2007-Aug. 2009.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  The objective of this project was to develop three modules that would improve the efficiency of ; intersection operations at isolated signalized intersections. The motivation for these modules was to use the ; existing detectors more efficiently. This would in turn reduce the number of detectors required at the ; intersection and also improve operations in case of detector failures. The adaptive variable initial module ; (Module 1) can improve the typical variable initial feature available in most signal controllers by factoring ; the turning movements at the intersections in real time along with queue distribution, and activity on ; driveways between the detectors and stop bar. The detector failure module (Module 2) develops a rolling ; database of phase utilizations of all phases at the intersections. The module uses this database to determine ; the appropriate phase time when a detector failure is identified. The variable detector module (Module 3) ; monitors the phase utilizations on the major-street phase and the volume on the right-turn and left-turn ; detectors to vary the delay programmed on detectors to further improve the intersection operations. ; Researchers evaluated Module 1 and Module 2 and found them improving the intersection operations. ; However, initial implementations of Module 3 showed limited benefits and only under very rare conditions. ; Thus, researchers did not develop Module 3 further. Modules 1 and 2 require data that are easily available ; within the controller and can be incorporated into the signal controller firmware.
  More +
• Format:
  PDF
• Funding:
  Project 0-6029
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17662/dot_17662_DS1.pdf
• File Type:
  [PDF - 2.26 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:21ee4f8cc379cc43ed3a1739a4416854ed28ba9d9bcd749cffaea2d68a76c149