This report documents a computer program, HEEM-III, that will analyze proposed added-capacity, bypass (new location), High Occupancy Vehicle (HOV), interchange, and railroad grade separation projects. The program represents a completely new program as compared to the HEEM-II computer program. The major changes include use of hourly volumes to calculate speeds and user costs, inclusion of intersection and interchange delay calculations, inclusion of yearly pavement condition and maintenance costs, and separate HOV analyses for the morning and afternoon peak periods. The program calculates motorist savings in user costs over a planning period. These user costs include delay costs, vehicle operating costs, and accident costs. HEEM-III comes in two versions, a PC version and a mainframe version. The PC version is a menu driven program that includes a data input and editing process, data analysis, output display, and procedures to save both the input and output data. The mainframe version uses batch input and produces the same output as the PC version. The mainframe version also has an option to output a single line of summary data, for use when a large number of problems are being run. HEEM-III is designed to give the user an economic analysis of a proposed highway improvement at the planning level by calculating the benefits to the motorists and giving the results in terms of both the Net Present Value and a Benefit-Cost ratio. This can be used in the project development process to define and evaluate alternatives and compare the relative merits of several proposed projects with a limited budget.

  • Supplemental Notes:
    • This report was revised Sept. 1991 and Sept. 1992. Research study title: Improvement of HEEM-II to Evaluate Urban Arterials and Interchanges.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas Department of Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Memmott, J L
  • Publication Date: 1990-11


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 157 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00627084
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-91/1128-1F, Res Rept 1128-1F, TTI: 2-8-89/0-1128
  • Contract Numbers: Study 2-8-89/0-1128
  • Created Date: Mar 16 1996 12:00AM