Travel Time Estimation on Arterial Streets

Micro-simulation models are widely and successfully used to estimate travel time on arterial streets. But micro-simulation of a large-scale traffic network is difficult to conduct because of the following three reasons: 1) limited computer power, 2) complicated network input data and 3) long model building, debugging, and validating time. In contrast, link performance functions such as the BPR function needs less detailed input data. Input data for BPR functions like volume and link capacity are easy to obtain. Therefore, BPR functions are still widely used to estimate travel time on arterial streets for planning purposes. However, it is also well known that BPR functions generate erroneous estimation of travel times on arterial streets especially under congested traffic conditions. This paper introduces a new algorithm for travel time estimation on arterial streets. Vehicles are grouped into packets referred to in the algorithm as observed vehicle group. Link travel time and intersection control delay of each observed vehicle group are estimated by the developed algorithm. The developed algorithm is a modified HCM2000 method which requires less network input data and computer power compared with micro-simulation. It provides better travel time estimation during short time interval updates on signalized arterial streets compared with BPR functions. This algorithm has been developed and has been validated by using actual data collected in the field as well as the developed algorithms in HCM2000. In other words, this algorithm can overcome the weaknesses of Micro-simulation and BPR functions. It can be used in Meso-scopic simulation for large-scale traffic network planning application.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01155143
  • Record Type: Publication
  • Report/Paper Numbers: 10-1335
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:36AM