Commute Trip Reduction (CTR) Law

Many major employers are affected by the Commute Trip Reduction (CTR) Law. Enacted in 1991 as part of Washington's Clean Air Act, the law requires major employers to provide employee transportation programs that encourage more employees to not drive alone to work every day.

While the specifics may differ slightly from city to city, generally a "major employer" is defined this way: a private or public employer that has at a single work site 100 or more full-time employees who begin their regular work day between 6 a.m. and 9 a.m. For more information about the CTR Law or to discuss how the law may affect your business, contact 206-684-4444 or e-mail employer.services@kingcounty.gov

Metro provides additional service to CTR-affected companies at its CTR web site.

Transportation Management Plan requirements

Some employers and property developers are also required as part of the building permit process to implement transportation programs for their employees or their tenants' employees. When a city approves the expansion of an existing facility or construction of a new facility that may adversely impact traffic, it frequently requires the development of a Transportation Management Plan (TMP) before granting a building permit.

If you believe that your building may be required to offer transportation benefits as part of a TMP, contact your city planning office for more information.

For additional assistance fill out the company information form or contact Employer Services by e-mail employer.program@kingcounty.gov or by phone 206-263-3444.