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Balboa Avenue/Garnet Avenue Closures Scheduled Through July

Balboa Avenue Railroad Bridge to be Demolished; Work Begins Tonight

May 17, 2018 – Starting tonight, May 17, construction crews will begin to dismantle the old railroad bridge that spans Garnet Avenue (before it turns into Balboa Avenue) just east of Interstate 5. The work will cause intermittent closures in the area overnight through July for safety reasons. Works hours and closures will be between 9 p.m. - 5 a.m., Sunday through Thursday.

Motorists will encounter various overnight lane and ramp closures on Balboa Avenue/Garnet Avenue and Morena Boulevard. Closures are necessary to accommodate the demolition of the Balboa Avenue Railroad Bridge.

These closures will be in effect on either westbound or eastbound Balboa Avenue/Garnet Avenue, from Interstate 5 to Moraga Avenue, through July 2018. Additionally, a full closure of the Balboa Avenue/Garnet Avenue off-ramp from northbound Interstate 5 will occur whenever eastbound Garnet  Avenue is closed.

Corresponding closures of the Morena Boulevard on- and off-ramps will be in place while closures are in effect on Balboa Avenue/Garnet Avenue. North Morena Boulevard ramps will be closed during the westbound Balboa Avenue/Garnet Avenue closures, and south Morena Boulevard ramps will be closed during the eastbound Balboa Avenue/Garnet Avenue closures. 

A minimum of one lane each of westbound and eastbound traffic will remain open to motorists at all times, and motorists will be able to access Morena Boulevard via alternate ramps. Motorists will be detoured to Damon Avenue to access Santa Fe Street while westbound Balboa Avenue/Garnet Avenue is closed.

Traffic controls and detour signs will be placed to alert motorists in advance.

This work is related to the Mid-Coast Trolley project. Once complete, the project will extend Blue Line service from Old Town to the University City community, serving the VA Medical Center, UC San Diego, and the busy commercial and residential districts along Genesee Avenue. Major construction work began in 2016, with service anticipated to begin in 2021.

For more information on Mid-Coast project construction, go to For transportation solutions during construction, visit

Project Manager(s)

For media inquiries, please contact the SANDAG Public Information Office at (619) 699-1950 or