Route 66 map, San Francisco map show route 66, which crosses the border

Now Playing: How San Francisco is preparing for the potential shutdown of Interstate 5 in the Bay AreaNow Playing: The best places to eat, shop and relax during the shutdownNow Playing, the worst places to live during the road shutdownNow Using Facebook, Google, and other social media to help guide the shutdown nowNow Using Uber to get around the shutdown Now Using Airbnb to rent out your home now in the meantime