Travel Demand and Traffic Simulation Modeling

Macro and Micro Modeling Coverage in Southern California for CLR Analytics

CLR has a world-class team specialized in travel demand modeling, traffic simulation modeling, and their various applications. We build travel models from scratch using travel survey data. We are proficient at several modeling tools including TransCAD, Cube Voyager, VISUM and EMME.  We are currently maintaining a customized version of Southern California Association of Governments (SCAG) travel demand model or the Orange County Transportation Authority Model (OCTAM) under the TransCAD platform.

 

CLR is a leading micro-simulation consultant in the world. Based on previous academic research and many practical projects conducted since late 1990s, consultants at CLR are proficient and have extensive experiences using the most popular microsimulation packages, including Paramics, TransModeler, and Vissim, for the following application areas.

  • Traffic control
  • ITS evaluation
  • Policy investigation
  • Operational improvement
  • Corridor management planning
  • Emission
  • Construction management
  • TMC operator training

 

We are not only skillful in building simulation models and performing alternative analysis, but also experts in the behavioral algorithms inside of the microsimulation models. Some of our research papers are highly-cited by the traffic simulation community and used as guidelines and references in various applications. We have a close relationship with simulation software developers and have been collaborating with them on consulting projects and software functionality enhancements. We are the major microsimulation (including Paramics, TransModeler, and Vissim) plugin developer in the world. Our plugins have been used by top consultants, universities, and government agencies.

 

From 2007 to 2012, CLR has been a major force in conducting travel demand modeling tasks, developing traffic simulation models, and performing traffic operations analysis for Caltrans' Corridor System Management Plan (CSMP) projects. The travel demand modeling tasks were performed for 12 corridors of the project using either the Southern California Association of Governments (SCAG) travel demand model or the Orange County Transportation Authority Model (OCTAM) under the TransCAD platform. Both models have been significantly improved through updating network geometry data for study corridors and enhanced through a few GISDK functions we developed for corridor studies. In addition, CLR performed detailed modeling studies for five CSMP projects using different traffic simulation packages (e.g., Paramics for SR 57 and I-5 in Orange County, Vissim for I-10 in San Bernardino County and SR 91 in Riverside County, and TransModeler for SR 91 in Orange County). All these comprehensive studies include heavy-duty data collection and analysis, OD estimation based on the regional travel demand model, microsimulation model calibration, and evaluation of alternative scenarios based on Base and horizon demands.

 

 

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