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SR-91 (SR-57 to SR-55) Improvement Project

Project Improvements

Segment 1, SR-91/Lakeview Avenue Interchange


Segment Improvements
  • Reconstruct Lakeview Avenue overcrossing to include standard lanes, shoulders and sidewalks in each direction

  • Realign westbound State Route 91 (SR-91) on-ramp at Lakeview interchange

  • Add new on-ramp from Lakeview connecting directly to SR-55

  • Separate westbound SR-91 and southbound SR-55 traffic

segment 1 map

Segment 2, Between SR-55 and SR-57


Segment Improvements
  • Add new eastbound general purpose lane

  • Reconstruct Kramer Boulevard and Tustin Avenue overcrossings to include standard lanes, shoulders and sidewalks in each direction

segment 2 map

Segment 3, SR-91/SR-57 Interchange


Segment Improvements
  • Improve westbound SR-91 to northbound and southbound SR-57 connectors Add an auxiliary lane from SR-57 to Raymond Avenue/East Street off-ramp

  • Reconstruct La Palma Avenue overcrossing to include standard lanes, shoulders and sidewalks in each direction

  • Add bypass ramp for northbound SR-57 Orangethorpe Avenue off-ramp prior to SR-91, eliminating the need to merge across multiple lanes at the interchange

segment 3 map

Project Partners and Funding


OCTA and Caltrans are working with the neighboring cities of Anaheim, Orange, Placentia, Fullerton and Yorba Linda. The project cost is $451 million and is funded by OC Go, 91 Express Lanes Excess Revenue and SB1.

Contact the SR-91 Community Outreach Team

If you have questions or would like to request information in other language, please contact the Outreach Team at (888) 280-7966 or email 91project@octa.net.