SAN DIEGO (AP) — San Diego’s bustling San Ysidro border crossing with Tijuana, Mexico, will be closed to southbound cars for more than two days in September.

The Union-Tribune newspaper reported Monday that the 57-hour closure is part of a plan to realign a portion of Interstate 5.

It’s the final phase of the $741 million expansion of the San Ysidro Port of Entry, the busiest border crossing in the Western Hemisphere.

From Saturday, Sept. 23, at 3 a.m. to Monday, Sept. 25, at noon, all cars will be barred from entering Tijuana through San Ysidro.

Vehicle traffic into Mexico will be rerouted 7 miles to the Otay Mesa Port of Entry.