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Portland Bureau of Transportation

Phone: 503-823-5185

Fax: 503-823-7576

1120 SW Fifth Ave, Suite 800, Portland, OR 97204

More Contact Info

Diagonal Diverters

Diagonal diverters place a barrier diagonally across an intersection, disconnecting the legs of the intersection.


Strategically located diagonal diverters reduce traffic volumes on a street. Diagonal diverters prevent through moves at an intersection.
Advantages Disadvantages
Effectively reduce traffic volumes
Can restrict vehicle access while retaining bicycle and pedestrian access
Prohibit or limit access and movement. While this is the purpose of diversion devices, some drivers consider it a disadvantage.
Restrict access for emergency and transit vehicles
Diagonal diverters cost approximately $15,000 - 35,000.
Parking Impacts:
Transit Service Impacts:
Diagonal diverters should not be considered on transit streets.
Emergency Services Impacts:
Generally, the turn restrictions imposed by a diagonal diverter would apply to emergency vehicles as well and are typically not used on primary fire response routes. However, diagonal diverters can be designed and installed to provide for emergency vehicle access.
Noise Impacts:
Other Considerations:
Diagonal diverters apply to all drivers, including local residents. Very special care must be taken to consider the availability, capacity, and appropriateness of the alternative routes drivers might use if a diverter is constructed.
Provision should be made to make diverters passable for pedestrians and bicyclists.
Examples In Portland:
Houghton Pl at Hamlin Ave    
NE Tillamook at 16th Ave