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Project Overview
The Sand Canyon Undercrossing was ranked by the Orange County Transportation Authority as one of the highest priority rail crossing projects in Orange County. Building this undercrossing will help relieve traffic delays and accommodate future travel needs in the area.

The undercrossing will be built to the west and alongside the existing Sand Canyon Avenue alignment. This new road will allow vehicles, pedestrians and bicyclists to travel safely under the railroad tracks and avoid delays from trains.

In addition, the project will widen Sand Canyon from four lanes to six lanes between Interstate 5 and Oak Canyon Road/Laguna Canyon Road, rebuild the intersection at Sand Canyon and Burt Road, build retaining walls, add landscaping and relocate the Walnut Bike Trail.

The project is estimated to cost $56 million and will be underway from mid-2011 to approximately late 2014. Funding is provided by a combination of Measure M – the half-cent sales tax for transportation improvements in Orange County – and state and local sources.