Interagency agreements
Find our frequently updated list of Interlocal Agreements, both in-development and in-effect, in compliance with RCW 39.34.040.
The Utilities, Railroads and Agreements office manages an agreement database and reports on interlocal agreements for specific work groups within WSDOT.
Active Interlocal Agreements (PDF 187KB)
If you would like a copy of a listed agreement, please contact the HQ Agreements and Policy Specialist.
Additional Interlocal Agreements executed by WSDOT under the authority of chapter 39.34 RCW are administered by Administrative and information technology contracts.
1,557 work zone-related crashes
were recorded on state highways in 2025.
542 people were injured
in 2025 due to work zone-related crashes.
29% increase in fatality collisions
in work zones from 2024 to 2025.