This article presents an overview of three interactive graphic transportation planning tools which have been and are being productively applied to planning problems in Europe--NOPTS, ICAM, and TSM. NOPTS has been developed as an aid for day-to-day operational planning in urban public transit. It can assist transit planners to: evaluate the impacts of changes in routing, schedules and vehicle allocations; examine a variety of routing schemes and compare their performance with respect to the objectives of both the transit agency and transit users; identify trade-offs between conflicting objectives; and optimally adjust the transit service to changing demand patterns. TSM-- Simulation Program for Urban Transit Operations Objectives--is used for: analysis of movements of transit vehicles and queueing phenomona; estimation of system performance (time delays, vehicle throughput); evaluation of the impacts of alternative designs (geometric design, station layouts); and evaluation of the impacts of alternative operating strategies (line frequencies, signal timing, priority rules). It has been applied to urban public transit systems; to network, sub-network or line segment studies; and to rail transit or rubber-tired transit on exclusive rights of way. ICAM--Interactive Car (Highway) Assignment Model--was developed as a planning tool to assist in the evaluation of alternative urban/regional highway networks. It consists basically of a multi-path traffic assignment model with which one or more projected orgin-destination matrices can be assigned to existing and proposed highway links. It can assist planners to: quantitatively and qualitatively compare alternative highway networks; evaluate alternative highway designs; evaluate signalization and other transport technical solution strategies; adapt existing highways to further demand in an optimal fashion; isolate bottle-necks resulting from changes in the demand of changes in other parts of the highway network; and determine the capacity of the highway network as a function of varying demand patterns.

  • Corporate Authors:

    Cygnus Communications, Incorporated

    P.O. Box 10922
    Eugene, OR  United States  97440

    Cygnus Communications, Incorporated

    Cambridge,   England 
  • Authors:
    • Rieple, R J
    • Gehner, C D
  • Publication Date: 1978-12

Media Info

  • Features: Figures;
  • Pagination: p. 18-25
  • Serial:
    • Computer Graphics
    • Volume: 1
    • Issue Number: 13
    • Publisher: Association for Computing Machinery (ACM)

Subject/Index Terms

Filing Info

  • Accession Number: 00194529
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 1982 12:00AM