Modeling Operating Speed and Speed Differential on Two-Lane Rural Roads

The geometric features of a highway network play a significant role considering the fact that collisions occur disproportionately on horizontal curves. Based on extensive literature review, the problem mainly stems from the lack of geometric design consistency-conformance of highway geometric characteristics with drivers' expectations. More specifically, drivers select their speeds according to their own perception of the road (referred to as the operating speed) rather than the designer's perception (referred to as the design speed). To address operating speed consistency evaluation in Canada, two sets of models for speed behavior were examined based on speed data collected using traffic counters/classifiers on 20 curves on two-lane rural highways in Ontario. Relatively weak relationships were developed for the traditional operating speed on horizontal curves, while stronger relationships were found for the 85th percentile speed differential from a tangent to a curve. It was also shown that the nonintrusive approach for speed data collection might reveal different speed behavior than that observed using radar guns.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Authors:
  • Misaghi, P
  • Hassan, Y
• Publication Date: 2005-6

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 408-418
• Serial:
  • Journal of Transportation Engineering
  • Volume: 131
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Design speed; Geometric design; Highway curves; Highway design; Highway safety; Literature reviews; Operating speed; Rural highways; Speed data; Speed measurement; Statistical analysis; Traffic measurement; Two lane highways
• Uncontrolled Terms: Speed differential
• Geographic Terms: Ontario (Province)
• Subject Areas: Data and Information Technology; Design; Highways; Operations and Traffic Management; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 01000431
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: May 27 2005 12:49AM