Commute Trip Reduction program

We administer the State Commute Trip Reduction Law to reduce carbon emissions and traffic congestion on the state's busiest commute routes. Find information and links to resources for employee transportation coordinators, jurisdiction program administrators and other stakeholders.

For employer transportation coordinators​

For jurisdiction program administrators

Commute trip reduction program guidance

State commute trip reduction law

How does commute trip reduction work?

The State Commute Trip Reduction Law affects worksites with 100 or more full-time employees who begin their shift between 6 and 9 a.m. on weekdays in the nine most populous counties in the state. Worksites develop and manage their own programs based on:

  • Transportation demand management strategies identified as having the greatest effect for their employees.
  • Locally adopted goals for reducing vehicle trips and miles traveled.

Worksites conduct commute trip reduction surveys every other year to measure vehicle miles traveled and the mode choices of their employees. WSDOT and jurisdictions use these survey results to report on collective progress toward drive-alone and vehicle miles traveled reduction targets.

We provide technical assistance to jurisdictions and employers implementing commute trip reduction, lead performance-focused data analytics, develop statewide policies and practices, and support the Transportation Demand Management Technical Committee and Executive Board.

Members of the technical committee fulfill the governance requirements in the State Commute Trip Reduction Law. With direction from the executive board, technical committee members develop policy to support a diverse set of transportation demand management solutions, including updates to WSDOT’s Commute Trip Reduction Program, Mobility on Demand, Mobility as a Service, first-last mile solutions and more. The groups represent diverse perspectives of citizens, businesses, state agencies, transit agencies and jurisdictions around the state.

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.