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Traffic Engineering and Transportation
The Lake Oswego Transportation System includes more than 178 miles of streets, 32 traffic signals, 12.0 miles of pedestrian pathways, and shared ownership of the Jefferson Street Rail Line (aka Willamette Shoreline Trolley) within the city limits. The streets are classified as major and minor arterials, major collectors, neighborhood collectors, and local streets; traffic counts are available on line.
The City’s Transportation System Plan (TSP) provides a plan for the development of the City’s transportation infrastructure. Specific projects are further developed as resources become available. The TSP includes elements for roadways, bike, pedestrian, transit and rail related improvements.
Concerns, comments and questions regarding traffic related matters can be sent to traffic@lakeoswego.city, and a staff person will respond. Make sure to include your contact information if you would like a response. For more information, please contact the Engineering Department at 503-635-0270.
In September 2025, City Council approved an ordinance to lower the speed limit on local residential streets and some neighborhood collectors in Lake Oswego from 25 miles per hour (mph) to 20 mph.
Public Works crews are rolling out the Go sLOw speed reduction program, moving clockwise one neighborhood at a time. Phase 1 includes replacing existing 25 MPH signs and was completed in late 2025. Phase 2 adds new posts and additional signs and is underway through early fall 2026.
New speed limits take effect as soon as the signs change.
All construction activities within the public right-of-way require an approved traffic control permit from the City of Lake Oswego. There is no fee for a traffic control permit.
The purpose of Neighborhood Traffic Management Program is to give community members greater participation in decisions regarding traffic management on neighborhood streets in order to promote the safety and livability of residential neighborhoods.
The McVey Avenue/Stafford Road Corridor Vision Study aims to identify potential street improvements to efficiently move people through this busy corridor and improve the safety for all users. Based on the 325 comments we received from our first online open house, our team developed some preliminary concepts for your review and input at our second online open house. Thank you for your feedback! We are incorporating this additional feedback into developing a Concept Development Report to present to City Council later this year.
The City of Lake Oswego’s transportation system plan (TSP) is an important document for long-range planning purposes as well as a tool for current developments. It provides a snapshot of the existing system, immediate changes, and future plans into year 2035.
Flashing Yellow Arrow signals are the new standard for permissive left turn movements. A permissive turn is one that can be made through gaps in oncoming traffic.
System development charges are fees paid by new development to recover a portion of the cost of existing infrastructure and to help fund new infrastructure.
Enjoy a ride on the Willamette Shore Trolley this summer!
The scenic 10.5-mile roundtrip ride takes about 90 minutes and features spectacular views plus several unique railroad attractions.
ODOT's Travel Advisory - TripCheck
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