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Interstate 5 from San Clemente to Oceanside has long been one of California’s traffic choke points, with no other nearby alternative routes between Los Angeles and San Diego.

So traffic delays could be significant Saturday with the U.S. military planning to fire live artillery rounds over Interstate 5 in Southern California. The freeway will be shut down temporarily Saturday afternoon along a 17-mile stretch of coastal northern San Diego County, just south of the border with Orange County.

What do we know about the closure?

The closure will begin at 11 a.m. and last until 3 p.m. The military event involving live ammunition being fired over the freeway is directed by the White Hous

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