Transportation & Environmental Services


TES staff plan and prioritize Snohomish County's road activities. They also perform environmental reviews of projects and keep the public informed of Public Works projects. Other responsibilities include traffic engineering and traffic signal maintenance.


  • Public involvement/communications

Customer Service Center/Permitting (View Page)

  • Aerial photos, 1947 to present
  • Applications for Title 13, Type A, B, C, and E Permits
  • Commercial vehicle permits
  • Neighborhood Watch signs (Type C Permit)
  • Research
  • Road deed information
  • Right-of-way code violations and citizen compalints
  • Right-of-way use permits for traffic control

Environmental Services

  • Environmental permitting services for publicly-funded projects
  • Environmental review of Public Works maintenance and repair projects.
  • Mitigation site design, construction oversight, monitoring, agency reporting and stewardship

Program Planning

Traffic Operations