Simulation-Based Comparative Performance Measures for I-295 Express Lanes in Jacksonville, Florida

This study was conducted along I-295 project in Jacksonville Florida which is still under construction intended to compare simulated performance measures and predict the benefit between managed lanes and the adjacent general purpose lane. VISSIM a microsimulation software was exploited in the study. In order to overcome operation and functional constraints in VISSIM, VB script was incorporated to make the model more robust. VB script was verified using the decision model equation by comparing managed lane facility share from VISSIM to the calculated share from the logit equation. The model developed reflected the actual site conditions where driver behaviors, speed distribution, and different vehicle classes according to the value of time were modeled in the study. A number of simulation runs were conducted and results averaged to have precise results. Four measures of effectiveness were taken into consideration; Speed, travel time savings, safety in terms of conflicts, and emissions. Since VISSIM gave out trajectory file for conflicts, Surrogate Safety Assessment Model, SSAM, was used to analyze the conflicts. The results obtained from the analysis indicated that there will be lower emissions, conflicts, and fuel consumption in express lanes compared to the adjacent general purpose lane for all levels of service, also travel time will be saved when using managed lanes at any traffic density. Therefore the analysis showed that, I-295 express lane will provide commuters with values of their money and also conserve the environment due to low emissions. This will help transportation agencies to judge on the implementation of the express lanes and make an appropriate decision on the improvements if required.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AHB35 Standing Committee on Managed Lanes.
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Machumu, Kelvin S
    • Sando, Thobias
    • Mtoi, Enock
    • Kitali, Angela
  • Conference:
  • Date: 2017


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 18p
  • Monograph Title: TRB 96th Annual Meeting Compendium of Papers

Subject/Index Terms

Filing Info

  • Accession Number: 01632208
  • Record Type: Publication
  • Report/Paper Numbers: 17-06536
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 6 2017 12:28PM