The 805 during Thursday afternoon rush hour is bumper to bumper, and this is light by normally heavy-traffic standards. Drivers are headed South, many of them to Mexico. Most of the folks are Mexican but they are joined by U.S. expatriates who live across the border because cost of living is so much lower.
For example, one of our friends tutors kids from wealthier San Diego families. Locally, a studio apartment could be rented for as low as $1,800 per month but likely considerably more. In Mexico, she pays $500 for a studio about 1.6 kilometers (1 mile) from the beach with an ocean view.