US Shuts Down Busiest Border Crossing Between Mexico, California The San Ysidro port of entry, which processes 20,000 pedestrians and 70,000 vehicles moving from Tijuana to San Diego each day, closed all passenger and commercial lanes and one of its two pedestrian crossings. https://www.washingtonexaminer.com/news/us-shuts-down-busiest-border-crossing-between-mexico-california