Subways run every 3 minutes during rush hour, and the buses are all private and provide unbelievable coverage of the city and suburbs, with fantastic frequencie

Subways run every 3 minutes during rush hour, and the buses are all private and provide unbelievable coverage of the city and suburbs, with fantastic frequencies too. The subway system is rather small, but the buses provide all the coverage needed. (There's also rail, but buses are the real workhorse, and again, they're private.)