EVALUATING TRAFFIC CAPACITY AND IMPROVEMENTS TO ROAD GEOMETRY

The geometric standards of a road, such as width, minimum curve radius, and maximum grades, can have a major effect on the costs of road construction and maintenance and on the speed, safety, and vehicle operating costs experienced by those who travel on the road. The report investigates methods for evaluating traffic capacity and improvements to road geometry in order to determine economically justified levels of investment in road geometry. A number of models are available for predicting speeds and operating costs for isolated vehicles as a function of road geometry. Of these the World Bank's Highway Design and Maintenance Standards Model (HDM-III) was found to have some advantages. The report concentrates on the development of simple models for incorporating the effects of increasing traffic flow into the road evaluation process.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/082130965X
• Supplemental Notes:
  • Also available in microfiche only from NTIS as PB88-140629/WTS.
• Corporate Authors:

  World Bank

  1818 H Street, NW
  Washington, DC  United States  20433
• Authors:
  • Hoban, C J
• Publication Date: 1987

Media Info

• Pagination: 157 p.

Subject/Index Terms

• TRT Terms: Construction; Costs; Geometric design; Highways; Maintenance management; Traffic simulation; Traffic speed
• Uncontrolled Terms: Construction costs; Highway user costs; Maintenance costs
• Subject Areas: Construction; Design; Finance; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00468156
• Record Type: Publication
• Source Agency: National Technical Information Service
• ISBN: 0-8213-0965-X
• Report/Paper Numbers: TP-74
• Files: TRIS, ATRI
• Created Date: Apr 30 1988 12:00AM