Los Angeles is ground zero for car culture in America. Its streets are choked with automobiles at all hours of the day. The freeways that lead to and away from it are more like parking lots than highways. For 50 years or more, the response to Los Angeles’ traffic woes has been to add more roads with more lanes.
The problem is so bad, it inspired Elon Musk to dream up the Hyperloop one day while sitting in traffic on the way to the airport. Musk has since amended that vision somewhat. Now he wants to build a multi-tiered system of tunnels underground so some lucky motorists will be able to speed along beneath the vehicular chaos going on above.