April 8–15, 2026

In addition to the projects listed below that may impact your commute, you can find information on work being done to enhance our City on the Capital Improvement Projects Map and the Road Construction Map.

Traffic Signal Shutdown at Alton Parkway and Pacifica

The traffic signal at Alton Parkway and Pacifica will be turned off or placed in red flash mode from
9 a.m. to 3 p.m. Thursday, April 9.

Every effort will be made to keep traffic flowing and minimize disruptions, but delays should be expected, and motorists should consider using alternate routes when possible.

College Park and Colony Park Neighborhood Street Rehabilitation

As part of the Street Rehabilitation Program, the City is performing pavement rehabilitation on local and residential streets in the College Park and Colony Park neighborhoods. The project team will make every effort to complete the project efficiently and minimize disruption to the community.

Work is scheduled to begin Monday, April 13, and will occur weekdays from 8 a.m. to 4 p.m. on residential streets and 9 a.m. to 3 p.m. on arterial streets through June.

Access to streets and driveways may be temporarily restricted while work is underway. Parking within the neighborhoods may also be limited during construction activities; vehicles must be parked outside the posted work areas until construction is complete and signage is removed. Access to businesses and private streets or communities will be maintained throughout the project.

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676.

Jeffrey Open Space Trail Extension Impacts Jeffrey Road

Work is underway on the first phase of the Jeffrey Open Space Trail (JOST) extension between Smoketree and Walnut Avenue. This phase of the project requires lane closures northbound on Jeffrey Road weekdays from 7 a.m. to 5 p.m.

Access to area residences and businesses will be maintained. Detour signage will be in place to direct motorists and pedestrians.

The JOST extension will connect to the Jeffrey Open Space Trail Bicycle & Pedestrian Bridge being built over the I-5 Freeway and Walnut Avenue. The bridge project and trail extension are anticipated to be completed this summer. Learn more about the JOST Bridge.

Jamboree Road and Main Street Intersection Enhancements

The Jamboree Road and Main Street intersection project is underway with work occurring weekdays from 7 a.m. to 5 p.m. and lane closures in place from 9 a.m. to 3 p.m.

The project, which will continue through October, includes modifications to the alignment and medians at the intersection to enhance traffic flow approaching the I-405 Freeway. It also includes modifying the traffic signal system, providing Class II bike lanes, and adjusting drainage facilities.

Every effort will be made to keep traffic flowing and minimize disruptions, but delays should be expected. Please consider using alternate routes.

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676. 

Woodbury Neighborhood Street Rehabilitation

Sidewalk, curb ramp, and miscellaneous concrete and accessibility improvements are underway on both arterial and local streets throughout the Woodbury neighborhood as part of the Street Rehabilitation Program. 

Work occurs weekdays from 8 a.m. to 4 p.m. on residential streets and 9 a.m. to 3 p.m. on arterial streets through June.

Access to streets and driveways may be temporarily restricted while work is underway. Parking within the neighborhood may also be limited during construction activities; vehicles must be parked outside the posted work areas until construction is complete and signage is removed. Access to businesses and private streets or communities will be maintained throughout the project.

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676.

Marine Way Extension and Undercrossing Project

Progress on the Marine Way Underpass and Extension Project is truly being set in stone this week.

In less than 24 hours, crews poured 1,700 cubic yards of concrete to form the bottom of the Marine Way underpass structure. Work will now transition to forming the walls of the underpass. 

The concrete for the Borrego Channel tunnel structure is continuing to dry and crews are beginning to remove the internal forms used to support the concrete.

Specialized crews are setting up and receiving materials this week to prep horizontal drilling for pipeline relocation work to lower existing utility lines along the railroad tracks below the new underpass structure. Work is scheduled to start next week.

We are looking forward to improving access to the Great Park while enhancing safety and supporting cleaner transportation options.

Learn more about the project and view our FAQs at cityofirvine.org/marineway.

I-5 Freeway Improvement Project Ramp Closures

The Orange County Transportation Authority, in partnership with Caltrans, is improving the I-5 Freeway between the I-405 Freeway and State Route 55 to reduce congestion, enhance safety, and improve travel.

Crews continue to implement temporary striping and place K-rail along the northbound and southbound I-5 Freeway, which requires the following ramp and lane closures:

• Wednesday, April 8, 10 p.m. to Thursday, April 9, 5 a.m.
  Northbound I-5 Jamboree Road on- and off-ramps
  Southbound I-5 Culver Drive on-ramps
  Southbound I-5 Tustin Ranch Road on-ramp
  Northbound and southbound I-5 outside lane between Jamboree Road and Culver Drive
  
  
• Thursday, April 9, 10 p.m. to Friday, April 10, 5 a.m.
  Northbound I-5 Culver Drive on- and off-ramps
  Northbound I-5 outside lane between Culver Drive and Jamboree Road
  Southbound I-5 Tustin Ranch Road on-ramp
  
  
• Friday, April 10, 10 p.m. to Saturday, April 11, 5 a.m.
  Northbound I-5 Culver Drive on- and off-ramps
  Northbound I-5 outside lane between Culver Drive and Jamboree Road
  Southbound I-5 Tustin Ranch Road on-ramp
  

In addition, the Orange County Transportation Authority is hosting a community meeting to share information and answer questions about the project, Saturday, April 11, from 10–11 a.m. at
Frontier Park, 1400 Mitchell Ave., Tustin. View the meeting flier.

To sign up for project updates, visit octa.net/I-5Project.

Learn about additional projects throughout our City, including project descriptions and work hours, as well as any lane closures and night and weekend work, which may occur intermittently on major arterials when permitted.