The largest project in OCTA’s history, the 16-mile I- 405 Improvement Project is more than halfway toward completion. OCTA is constructing the I- 405 Improvement Project between SR- 73 and I-605, which will add one regular lane in each direction from Euclid Street to I-605, and an additional lane in the center of the freeway that will combine with the existing carpool lanes to form the 405 ...

OCTA, en cooperación con el Departamento de Transporte de California (Caltrans), está ampliando la Autopista de San Diego (I- 405) entre la Ruta Estatal 73 (SR- 73) y la Interestatal 605 (I-605). El proyecto mejorará 16 millas de la I- 405 entre la autopista SR- 73 en Costa Mesa y la I-605 cerca de la frontera del condado de Los Ángeles.

The project will also construct the 405 Express Lanes from SR- 73 to I-605. Completion of the Heil Avenue bridge restores a connection across the freeway that is vital to local schools, pedestrians and bicyclists in Huntington Beach and Westminster. Check out the video and enjoy the story of the bridge and its importance to the community.

SR-55 (I- 405 to I-5) Improvement Project Closure & Detour Map - Google My Maps LEGEND: Red Icon - Full Closure Yellow Icon - Lanes Closed/Partial Closure Orange Icon - Bridge Work Blue Icon - Project Improvements To maintain the safety of the traveling public and construction crews, slow down and stay alert while traveling through the Project area.

The improvement plan extends 16 miles from Costa Mesa to the Orange County-Los Angeles County border and includes adding a regular lane in each direction of 405 between Euclid Street and the 605, adding a second lane that will become part of the 405 Express Lanes between SR- 73 to the 605, reconstructing 18 bridges that span the freeway ...

Fullerton Park-and-Ride to Orange County Fairgrounds via 5 Fwy / 55 Fwy

Frequently Asked Questions May 31, 2012 Overview The questions and answers below provide current information on proposals to improve the Interstate 405 (I- 405). The study area extends from about the State Route 73 (SR- 73) in Costa Mesa to the Interstate 605 (I-605) at the Orange/Los Angeles County line.

At its most recent meeting, the OCTA Board approved the initial 405 Express Lanes toll policy. The I- 405 Project will improve 16 miles of I- 405 between the SR- 73 freeway in Costa Mesa and I-605 near the L.A. County line.

The $1.9 billion I- 405 Improvement Project is adding one regular lane in each direction between Euclid Street and I-605, and a second lane in each direction in the center of the freeway from SR- 73 to I-605 that will combine with the existing carpool lanes to form the 405 Express Lanes. Learn more about the project and access the map here.

The largest project in OCTA’s history, the I- 405 Improvement Project will improve 16 miles of I- 405 and add one regular lane in each direction from Euclid Street to I-605. It will also construct the 405 Express Lanes from SR- 73 to I-605. This is the first part of an ongoing series that reports on what’s happening behind the scenes.