When it comes to cars, San Francisco is a weird place. There's a "transit first policy" where high-rise condos are allowed only if they have less parking spaces than units. There's the parking meters that in my 'hood are more than 16 hours a day, 7 days a week - with a minimum $50 fine. The meter maids also ticket for not curbing your wheels - ON FLAT STREETS.
Overall, San Francisco generates ~10% of its annual budget - more than $100M per year - from various traffic enforcements. Autonomous vehicles will put the squeeze on the budget, the police budget, and the homeless budget.