Microsimulation of Congested Freeway with Multiple Vehicle Classes Using AIMSUN: A Case Study on SR-99N

A procedure for constructing and calibrating a microsimulation model of a congested freeway with multiple vehicle classes by using AIMSUN is presented in this paper. This procedure is applied to a 13 mile long stretch of SR-99 Northbound in Sacramento, California. The test site contains a mainline high occupancy vehicle (HOV) lane, 16 metered on-ramps with and without HOV lanes, freeway interconnection and three interacting bottlenecks. The model construction and calibration procedure is as follows: (1) building the road geometry in AIMSUN, (2) collection of the traffic condition data from the PeMS database, (3) imputation of missing data, (4) estimation of on-ramp demand and off-ramp turning ratio, (5) identification of recurring bottlenecks, (6) setting model parameters, and (7) adjustment of model parameters such that the simulation results match with the field measurements. Model calibration results indicate that the simulated flow match with the field data near bottleneck locations reasonably well under the criterion of root mean square percentage error (RMSPE) and GEH criterion. The calibrated AIMSUN microsimulation model will be used as a simulation test bed for implementing a coordinated ramp metering (CRM) control strategy, which has the goal of alleviating the heavy congestion of the SR-99N freeway during the morning peak period.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AHB20 Standing Committee on Freeway Operations. Alternate title: Microsimulation of Congested Freeway with Multiple Vehicle Classes Using AIMSUN: Case Study on SR-99N.
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Wu, Cheng-Ju
    • Lu, Xiao-Yun
    • Horowitz, Roberto
    • Shladover, Steven E
  • Conference:
  • Date: 2016


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 95th Annual Meeting Compendium of Papers

Subject/Index Terms

Filing Info

  • Accession Number: 01592768
  • Record Type: Publication
  • Report/Paper Numbers: 16-2974
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 4 2016 5:05PM