Agencies that manage multimodal transportation corridors can use AMS methodology with ICM decision support systems to facilitate predictive, real-time, and scenario-based decision-making.
Analysis, Modeling, and Simulation (AMS) assessment of Integrated Corridor Management (ICM) on I-15 in San Diego.
Made Public Date


San Diego
United States

Integrated Corridor Management Analysis, Modeling, and Simulation for the I-15 Corridor in San Diego, California: Post-Deployment Assessment Report


The focus of the ICM Post-Deployment assessment was to investigate the impacts of ICM in its "as deployed" state using Analysis, Modeling and Simulation (AMS) tools in San Diego. Macroscopic and microscopic simulation models were used to characterize and estimate the impacts of driver behavior in response to various traffic control strategies and changes in multi-modal options.

The ICM strategies modeled in the post-deployment AMS analysis included:

  • Active decision support system
  • Coordinated incident management
  • Freeway coordinated ramp metering
  • Actionable traveler information (en-route and pre-trip via CMS, a new 511 app, and other commercial sources)
  • Upgrades to selected traffic signal systems (new traffic signal coordination timings, responsive traffic signal control)
  • Alternate route wayfinding signs.

Lessons Learned

AMS aids in the broader goals of ICM Evaluation by providing a framework that can be used to quantify potential and actual benefits of localized ICM strategies. In San Diego, AMS instigated the use of performance measures to inform and refine the response plans. This allowed AMS to provide insights through measurable results, a major factor that can help agencies determine which transportation investments are worthwhile.

Transportation professionals can integrate AMS methodology with ICM decision support systems to facilitate predictive, real-time, and scenario-based operational decision-making. AMS allows agencies to "see around the corner", producing simulations of possible future conditions, allowing agencies to react proactively and manage the transportation corridor as a multimodal system, as opposed to managing individual assets.

Goal Areas