Commute Trip Reduction Program

In 1991, the State of Washington adopted its Commute Trip Reduction (CTR) law. The law is focused on reducing  traffic congestion and air pollution by shifting drive-alone commutes to other modes. Today, more than 1,000 worksites take part in the CTR program statewide, with approximately one-quarter  of those sites in Seattle. The program is well known nationally as an example of impactful Transportation Demand Management (TDM). 


Seattle's CTR program is a partnership between the State, City, our local Transportation Management Association, and Seattle employers. The business-oriented program provides education, events, communications, and data insights to support commuters, employers, and the environment through transportation choices. The program has seen substantial decreases in driving alone, and currently over two-thirds of CTR affected commuters choose transit, walking, carpooling, bicycling, or telecommuting.  See our performance report from 2020 for more insights on mode split and more. 

CTR Requirements icon

CTR Requirements

Draft 2019-2023 Networks and Targets

2019-2023 Networks and Targets

CTR Recognition Program icon

CTR Recognition Program

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