In this Tuesday, Sept. 19, 2017 photo, construction continues on a new curve along California's Interstate 5, as it approaches the border with Tijuana, Mexico, in San Diego. The San Diego to Tijuana border crossing, busiest border crossing in the United States will close this weekend to the more than 40,000 cars that pass through it daily to Mexico. The weekend border closure is to allow for the removal of a large metal canopy spanning over all the southbound lanes into Mexico. (AP Photo/Gregory Bull)

Expansion work closes busiest US-Mexico border crossing

September 23, 2017 - 1:59 pm

SAN DIEGO (AP) — People kicking off fall vacations in Mexico this weekend won't be able to use the nation's busiest border crossing to get there.

The southbound lanes of the San Ysidro crossing connecting San Diego to Tijuana closed at 3 a.m. Saturday and will remain closed until noon Monday for work on a $741 million expansion project.

The Mexican side of the crossing, used by people traveling into the United States, will remain open.

U.S. officials have been warning travelers for days to avoid driving to Baja California until the crossing reopens. Several large "road closed" signs were placed along Interstate 5 early Saturday morning as traffic was diverted off the freeway. Those who do will be detoured east to the much smaller Otay Mesa crossing, and a massive traffic jam could be the result.

"Don't even think about going across in a vehicle," Jason M-B Wells, executive director of the San Ysidro Chamber of Commerce, said earlier this week. "It's going to be a standstill."

The closure is to allow for the removal of a large metal canopy spanning the southbound lanes into Mexico.

The work is believed to represent the largest renovation of a crossing along the nearly 2,000-mile (3,218-kilometer) U.S.-Mexico border. It has been in the works for years to ease congestion and boost cross-border commerce.

When the crossing reopens Monday, it will contain three southbound lanes while California's Interstate 5 is realigned to feed into the renovated arrival point. U.S. officials expect traffic flows to go back to normal by Thanksgiving, when four of the five lanes at the Western Hemisphere's largest land crossing will be open.

Once complete in summer of 2019, there will be 10 southbound lanes — twice the current number — to handle the estimated 40,000 vehicles that pass through San Ysidro on weekends and 50,000 on weekdays. The expansion also adds eight more lanes from Mexico to the United States.


This story has been clarified to show only the southbound lanes are closed, affecting travelers heading into Mexico.

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