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Resources and tools for commute coordinators

About the Commute Trip Reduction (CTR) Law

Washington State’s Commute Trip Reduction (CTR) Law was passed by the Legislature in 1991 with goals to improve air quality, reduce traffic congestion, and reduce the consumption of petroleum fuels through employer-based programs that encourage the use of alternatives to driving alone. Alternatives include riding the bus or train, carpooling, vanpooling, bicycling, walking, working a compressed work week or teleworking.

The Washington State Legislature passed the CTR Efficiency Act (.pdf 123kb) in 2006 and revised the goals for trip reduction; each city and county must reduce drive alone trips at major worksites by 10% by 2011.  Local jurisdictions have revised their CTR ordinances and published new CTR goals for employers.

The law requires major employers to develop and implement an employee commute program to reduce the number and length of drive-alone commute trips made to the worksite. Local jurisdictions (cities and counties) implemented ordinances to define how the law would apply to worksites in their area. Local jurisdictions are required to provide training and technical assistance for employers.

The CTR Law is working

  • CTR continues to perform, removing 28,000 vehicles from Washington roadways every weekday morning in 2009.
  • CTR reduced 12,900 hours of delay in the Central Puget Sound Regional in 2009, saving $99 million for the region in congestion costs due to lost time and wasted fuel.
  • Statewide, CTR reduced 62 million vehicle miles traveled (VMT) annually, equivalent to 27,490 metric tons of greenhouse gasses and three million gallons of fuel.
  • Each morning peak traveler in Central Puget Sound saved $59 in 2009 due to the increased system efficiency provided through the CTR program.

    CTR employers and jurisdictions are making progress

    Overall jurisdiction results

    Survey Cycle




    % Change

    Drive alone rate





    VMT per employee





    Source: CTR survey data

    To read more about the costs and benefits of the CTR Program, download the 2011 CTR Report To the Washington State Legislature. (.pdf 1MB)

    Is your company affected by the CTR Law?

    Do you have 100 or more employees at a single worksite who:

    • commute to work between 6:00 AM and 9:00 AM?
    • work at least two days a week in positions intended to last 12 months or more?

    If you answered, "Yes," to this question, your worksite is likely affected by the CTR law. Your city provides free commute program support. Click here to find your Employer Transportation Representative.

    If you answered, "No," to this question, Metro provides limited free and fee-based support for building a commute program. Please visit Employer Services for more information.