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9611 SE 36th Street
Mercer Island, WA 98040
Phone: 206.275.7600
Fax: 206.276.7663
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City of Mercer Island / City and Regional Projects / Transportation Improvement Program (TIP)

Transportation Improvement Program (TIP)


The Transportation Improvement Program (TIP) is a rolling 6-year plan updated annually with a focus on maintaining the existing transportation network and improving it in a thoughtful, safe manner working within the financial constraints of the Street Fund and other funding sources. The TIP covers City roadway, pedestrian, bicycle and other transportation projects.

State law requires that the TIP be updated and adopted by elected officials annually.  The City Council adopted the 2020-2025 TIP in June 2019.

Click on the links below for information about the current TIP  
Submit Comments:
Comments are accepted online at the City's new public engagement portal and can be submitted on a map of the Island, or as plain text. If you prefer to Email the City with comments, see contact info below.

2019 Schedule:
  • March 15-April 15: Public comment period
  • May 7: City Council Public Hearing and TIP Preview
  • June 4: City Council adoption of 2020-2025 TIP

The TIP typically includes the following categories:
  • Residential Streets Preservation Program
    • Asphalt overlays
  • Town Center Street Improvements
    • Asphalt overlays
  • Arterial Streets Improvements
    • Large patches to extend the life of arterial streets
    • Asphalt overlays and reconstruction of streets
    • Reinvestment in Existing Pedestrian and Bicycle Facilities (PBF)
  • New Pedestrian and Bicycle Facilities (PBF) 
    • Safe routes to school
    • Creation of new pedestrian and bicycle facilities (e.g. paths, sharrows, paved roadside shoulders, bike lanes, crosswalks)
    • Signage and pavement markings
  • Other Transportation Projects 

If you have questions or comments about the TIP process, please contact the Public Works Department at


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