Oso Parkway Bridge

oso arial view


The Oso Parkway Bridge Project will replace a portion of Oso Parkway with a new bridge structure to provide motorists with a direct connection between Los Patrones Parkway (a new road connecting with Rancho Mission Viejo) and State Route 241, thus improving traffic flow and safety on Oso Parkway. The future bridge will contain six lanes (three in each direction), dedicated bike lanes and sidewalks. Pedestrian access to Tesoro High School will be improved with the construction of a new sidewalk on the south side of Oso Parkway.  OC Public Works will oversee construction of the two-year project.

Project Updates

Here's a summary of construction activities over the coming weeks:

7 a.m. to 5 p.m., Saturday, Aug. 25 - Paving Work

  • Crews will be paving a temporary detour road along the south side of Oso Parkway between Los Patrones on-and off-ramps. Work is scheduled on the weekend to avoid impacts to school and work commuters.

9 p.m. Tuesday, Aug. 28 to 5 a.m., Wednesday, Aug. 29 - Nighttime Work

  • Final preparation for the new temporary lanes on Oso Parkway. One lane in each direction will be open to motorists during this nighttime work. Work is scheduled at night to avoid impacts to school and work commuters.

Beginning after 5 a.m., Wednesday, Aug. 29 -  Temporary Lanes, Traffic Switch

  • Motorists will be transitioned to the new temporary lanes (two lanes in each direction) along the south side of Oso Parkway within the project area.
  • Traffic control measures will be in place. For the safety of the crews and traveling public, please observe all signs, barriers and personnel within the project area.
  • Traffic lanes will narrow slightly to 11 feet wide to keep motorists moving while accommodating construction.
  • U-turns at the intersection of Oso Parkway and northbound SR-241 will be prohibited.

Project Highlights

  • Provides a direct connection from Los Patrones Parkway to State Route 241
  • Improves traffic flow, enhances safety and supports regional mobility
  • Constructs a sidewalk on the south side of Oso Parkway to improve pedestrian access

What to Expect During Construction

  • At least two lanes will be open in each direction on Oso Parkway.
  • Bike lanes will be impacted; motorists and bicyclists will share the road.
  • Watch for construction signs when traveling through the project area.

print icon Click here for the Oso Bridge Project Printable Fact Sheet.

Project Location

oso bridge project map

The Oso Parkway Bridge Project is located along Oso Parkway between the southern terminus of State Route 241 and the new Los Patrones Parkway, east of Tesoro Creek Road.

Project Schedule

Duration: Mid-July 2018 through approximately summer 2020 (two years)

Days / hours: Mon-Fri, 7 a.m. to 5 p.m., with limited night work

Separate weekend work will take place on State Route 241 to remove toll booths.

Note:  Construction schedule and times are subject to change due to unforeseen operational factors or inclement weather.

Questions & Answers

Visit the Oso Parkway Bridge Project Q&A.

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State Route 241 Questions?  Contact the Transportation Corridor Agencies (TCA) at: