Transportation Improvement Plan (TIP) 2025

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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 financial constraints. The TIP covers City roadway, pedestrian, bicycle and other transportation projects. Review the 2025-2030 TIP here.

Note: The City has an existing long-term plan that identifies various future upgrades in pedestrian and bicycle facilities, many of which are adopted into the TIP.

Each year, public comment and staff input are gathered to inform new proposed additions to the TIP; then the City Council makes the final decision on each project's priority. Projects would be implemented between 2026-2031.

You can learn more about the TIP on this page and then post your comment or add a note to the interactive map (comments received by April 30 will be included in the materials for the May 20 public hearing). Some public comments may fall outside the scope of the TIP - please check the list below to see who else you might need to contact:

  • For general public works service requests (e.g. potholes, missing signs) please use our online tool.
  • For traffic enforcement issues (e.g. speeding, parking) please contact the MIPD.
  • For I-90 operational issues, contact WSDOT.
  • For Light Rail construction issues, contact Sound Transit.

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 financial constraints. The TIP covers City roadway, pedestrian, bicycle and other transportation projects. Review the 2025-2030 TIP here.

Note: The City has an existing long-term plan that identifies various future upgrades in pedestrian and bicycle facilities, many of which are adopted into the TIP.

Each year, public comment and staff input are gathered to inform new proposed additions to the TIP; then the City Council makes the final decision on each project's priority. Projects would be implemented between 2026-2031.

You can learn more about the TIP on this page and then post your comment or add a note to the interactive map (comments received by April 30 will be included in the materials for the May 20 public hearing). Some public comments may fall outside the scope of the TIP - please check the list below to see who else you might need to contact:

  • For general public works service requests (e.g. potholes, missing signs) please use our online tool.
  • For traffic enforcement issues (e.g. speeding, parking) please contact the MIPD.
  • For I-90 operational issues, contact WSDOT.
  • For Light Rail construction issues, contact Sound Transit.

Post a Public Comment

We encourage you to use the mapping tool ("Map Your Input") to attach your comment/suggestion to a certain location. 

But if you have a general comment, you may also post it below; all comments will be considered as part of the public record and are reviewed by staff. You will be asked to sign in, or register (30-seconds), so that we can contact you if needed. Be a good neighbor and keep your comments civil - please refer to our moderation policy for more details. 

Remember to include location information, such as an intersection or street address of the nearest house/building. [ If you have a specific question about the TIP process, please contact the Public Works Department at PublicWorks@mercerisland.gov]

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Page last updated: 05 Mar 2025, 11:40 AM