BENEFIT ANALYSIS FOR URBAN GRADE SEPARATED INTERCHANGES

A procedure for evaluation the user benefits from highway improvement is demonstrated through a hypothetical case study. A comparison is made between an urban-grade separated interchange and an at-grade intersection in terms of delay, vehicle operating cost, accidents, and vehicle emissions for several traffic demand levels. The results indicate that the urban-grade separated interchange may be economically viable at an average daily demand as low as 40,000 total entering vehicles. Benefit cost ratios of 2.4 and 3.6 are generated with and initial average daily demand level of 80,000 total entering vehicles depending on the assumed traffic growth rate. A benefit/cost ratio of 2.9 is generated with an initial average daily demand of 60,000 total entering vehicles, assuming a 2.5 percent annual growth rate. Potential reductions in annual delay, fuel consumption, total vehicle emisssions, and accident costs amounting to 73, 21, 40, and 80 percent, respectively, are indicated.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Witkowski, J M
• Publication Date: 1988-1

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 93-109
• Serial:
  • Journal of Transportation Engineering
  • Volume: 114
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Alternatives analysis; Benefit cost analysis; Case studies; Costs; Crashes; Exhaust gases; Fuel consumption; Grade separations; Highways; Improvements; Interchanges; Intersections; Motor vehicles; Operating costs; Traffic delays; User benefits
• Uncontrolled Terms: Accident costs
• Subject Areas: Design; Energy; Finance; Highways; Planning and Forecasting; Safety and Human Factors; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00465688
• Record Type: Publication
• Report/Paper Numbers: ASCE Paper 22142
• Files: TRIS
• Created Date: Feb 29 1988 12:00AM