Integrated Corridor Manangement Demonstration Sites

The U.S. Department of Transportation (USDOT) selected two corridors—US-75 in Dallas, TX, and I-15 in San Diego, CA—to demonstrate the nation’s first ICM systems as part of the Department’s ICM Initiative. The sites began actively deploying their systems in spring 2013.

While having distinct characteristics and challenges, the Dallas and San Diego demonstration sites developed their ICM systems using a process grounded in systems engineering principles. Both sites require collaborative institutional relationships between multi-jurisdictional agencies.

Both sites also developed and are implementing near real-time decision support systems (DSS) to coordinate ICM across their regions. This technology processes information on conditions in the corridor and recommends response plans containing optimal combinations of multimodal operational strategies to deploy to prevent or lessen the effects of congestion—both recurring and non-recurring.

Strategies and Partners at the ICM Demonstration Sites

Example DSS Response Plan Strategies


  • Divert onto frontage roads, arterials, and/or light rail, depending on severity of event on
  • Implement dynamic signal timing to maximize throughput on diversion routes
  • Provide real-time information on traffic conditions (including speeds), public transit, and
    parking availability through 511 system
  • Provide diversion recommendations (including mode shift to light rail) on dynamic message signs,
    under certain conditions
  • Dallas Area Rapid Transit
  • City of Dallas
  • Town of Highland Park
  • North Central Texas Council of
  • North Texas Tollway Authority
  • City of Plano
  • City of Richardson
  • Texas Department of Transportation
  • City of University Park
  • Provide en-route and pre-trip traveler information and enhanced transit network information
    through a new 511 smartphone app for trip decision-making
  • Coordinate signal timing with ramp meters
    to optimize mode shifts between the freeway and arterials
  • Deploy dynamic wayfinding signs on arterials to re-direct diverted traffic back to freeways
  • San Diego Association of
    Governments (SANDAG)
  • California Department of
  • City of Escondido
  • Metropolitan Transit System
  • North County Transit District
  • City of Poway
  • City of San Diego

Deployment Update

The Dallas and San Diego stakeholders are actively monitoring traffic, applying their DSS, and implementing recommended response plans on their ICM corridors. Stakeholders at each site meet regularly to discuss why certain plans have or have not been implemented. This feedback helps to continuously reassess the system’s functionality and make adjustments as needed.

In Dallas, the project team initially designed their DSS to require an ICM coordinator to approve recommended response plans before sending them to the implementing agencies. They have decided to remove this requirement so that stakeholders receive the plans directly. With over 400 response plans already developed, the team continues to assess whether plans should be added, removed, or revised to optimize their effectiveness.

In San Diego, response plans were originally set not to be implemented if no agencies reviewed the plan within a specific timeout period. However, within a few months of deployment, the stakeholders were sufficiently comfortable with the ICM system to allow response plans to be automatically implemented after the timeout period. Response plans are automatically selected if they achieve a certain score, based on their anticipated effectiveness. The project team is continuing to adjust this score so that more plans can be deployed in the field and measured for effectiveness.

Early Lessons Learned

The demonstration site teams cited some sample early lessons learned including:

  • Regular communication and meetings with partner agencies are a valuable resource and critical throughout the project lifecycle, as they foster understanding and perspective.
  • Following the systems engineering “V” process can be challenging at first, but provides an essential technical platform for building a robust design.
  • Collecting and processing the necessary data can be one of the most time-intensive aspects of planning and designing an ICM system, and figuring out how to use that data postdeployment can be a challenge.
  • Performance measures and evaluation criteria should be considered very early in the planning process and kept as a priority throughout design and implementation.
  • Agencies should keep post-deployment operations and maintenance (O&M) in mind when designing their systems and identify funding sources and regional agreements and policies for O&M in advance.

ICM Vision:

The vision of ICM is that cities, towns, and regions will realize significant improvements in the efficient movement of people and goods through proactive integration and management of major transportation corridors. With ICM, individual agency or network actions will be based on conditions within and impacts across the entire corridor for a smoother travel experience.

Want to learn more? Check out the full ICM fact sheet series:

  • ICM Overview
  • ICM Pioneer Sites
  • ICM Demonstration Sites
  • ICM Analysis, Modeling, and Simulation
  • ICM Decision Support Systems
  • ICM Knowledge and Technology Transfer

Stay Tuned

The USDOT will continue to disseminate guidance and lessons learned from the demonstrations so that agencies interested in pursuing ICM can shape approaches that work best for their corridor. The USDOT is also conducting independent “beforeafter” analyses at both sites to evaluate the benefits of ICM on transportation operator situational awareness, response and control, traveler information, and overall corridor performance. The evaluation will be completed in late 2014, with results available in 2015.

Visit the ICM Knowledgebase to access documents developed by the demonstration sites.

For more information about this initiative, please contact:

Steven Mortensen
Federal Transit Administration
(202) 493-0459

Neil Spiller
Federal Highway Administration
(202) 366-2188

Robert Sheehan
ITS Joint Program Office
(202) 366-6817