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Commute Trip Reduction Program  

The Washington State Commute Trip Reduction (CTR) program is a partnership with state and local governments, major employers and other agencies to work toward reducing greenhouse gas emissions (GHG). The purpose of the law is to reduce traffic congestion, minimize energy consumption and to improve air quality by convincing people to try other ways of getting to work besides driving alone. In 1991, the Washington State Legislature adopted the Commute Trip Reduction (CTR) Law, RCW 70.94.521-527 and incorporated this into the Washington Clean Air Act. This was modified by state legislature and adopted as the CTR Efficiency Act in 2006 with an update in 2013. The City of Tukwila adopted Ordinance #2201 to support the requirements of the law. The goal of the CTR Efficiency Act is to improve the efficiency of the overall transportation system by requiring jurisdictions to decrease drive alone rates by 10% and vehicle miles traveled by 13% over the next four years. Modifications to the CTR program under the CTR Efficiency Act are intended to focus on the most congested areas of the state by increasing the planning coordination between local, regional, and state organizations.

The CTR program benefits our state’s transportation system and economy. Between 2007-2012, employees at nearly 1,100 CTR affected worksites reduced their rate of driving alone to work by 3.1 percent. The program’s participants leave about 12,000 cars at home every day as they commute to work by bus, train, vanpool, walking, biking or teleworking instead of driving alone to the office. Between 2007-2012, CTR affected employees reduced their annual GHG emissions by an estimated 17,000 metric tons, which is roughly equivalent to the carbon found in 73 railcars’ worth of coal. Access to an efficient transportation system is fundamental for communities and employers to support livability and sustainability of resources.


CTR in Tukwila Today

The City encourages all employers to voluntarily develop and participate in trip reduction programs. City assistance in handling transportation demand issues is available to all Tukwila employers. The City offers many tools to assist employers and employees with making commute decisions. Opportunities to participate in local transit and rideshare promotions are readily available. What can we do to help you with your goals?

Basic Requirements for Employers: An employer with 100 or more employees who report to work at a single site between 6 and 9 a.m. is subject to the law. Some employers are considered affected by the ordinance as a condition of their permit. The employer must:

  • Appoint and maintain an individual to act as an Employee Transportation Coordinator (ETC) for employees and to be the primary contact with the City. City ordinance requires training for ETC’s.
  • Develop and promote a program that helps employees reduce drive-alone commute trips.
  • Submit the program to the City for review and approval once every two years.
  • Conduct a commute survey every two years to measure employees’ drive alone rates.
  • Exercise good faith effort by collaborating with the City in administration and implementation of the law.

For more information contact the Commute Trip Reduction Coordinator at (206) 433-7142.


CTR Related Documents

♦  RideshareOnline.com Reference Guide   - For Administrators (ETCs)

♦  RideshareOnline.com Reference Guide   - For Users (Employees)

♦  Tukwila’s Adopted CTR Plan 2008

♦  Summary of changes to the City of Tukwila CTR Ordinance #2201   (2008)

♦  Growth & Transportation Efficiency Plan for the Tukwila Urban Center

♦  City of Tukwila CTR Ordinance #2201

♦  City of Tukwila “Walk and Roll” Plan


Useful Links






Contact Information:

Department of Community Development
6300 Southcenter Blvd., #100
Tukwila, WA 98188

Phone: 206 431-3670
Fax: 206 431-3665

Email Planning Division

Email Building Division