ESTIMATING ARTERIAL TRAVEL TIME USING LOOP DATA - PHASE II

Successful implementation of advanced traveler information systems over an entire urban network requires real-time measurement or estimation of arterial travel times (or equivalent arterial journey speeds). This project develops an arterial journey speed model using data from inductive loop detectors and traffic controllers. This model incorporates the following key findings of traffic data analysis that researchers collected in Phase I: (1) Spot speeds are highly correlated with journey speeds when both speeds are low [0-15 mph (0-24 kph)] and uncorrelated with journey speeds when both speeds are high [greater than 25 mph (40 kph)]; and (2) Signal offsets or greenband width, traffic demand, green splits and capacity-reduction incidents are major factors that affect arterial travel time/journey speed. The model consists of two parts--the speed estimated from the volume and occupancy measured by detectors and the speed estimated based on critical volume/capacity ratio. Researchers tested and compared the model with a number of existing models, with promising results.

• Record URL:
  • https://ntlrepository.blob.core.windows.net/lib/21000/21300/21336/PB99112013.pdf
• 
• Corporate Authors:

  University of Iowa, Iowa City

  Department of Civil and Environmental Engineering
  Iowa City, IA  United States  52242

  Minnesota Department of Transportation

  395 John Ireland Boulevard
  St Paul, MN  United States  55155
• Authors:
  • Zhang, Ming
  • Kwon, E
  • Wu, T Q
  • Sommers, K
  • Habib, A
• Publication Date: 1998-8

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 85 p.

Subject/Index Terms

• TRT Terms: Advanced traveler information systems; Arterial highways; Estimating; Loop detectors; Mathematical models; Spot speed; Traffic data; Traffic speed; Travel time
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00759261
• Record Type: Publication
• Report/Paper Numbers: MN/RC-1998/19,, Final Report
• Contract Numbers: 74884 TOC #2
• Files: NTL, TRIS, ATRI, STATEDOT
• Created Date: Jan 27 1999 12:00AM