1. Denver-Aurora, Colo.
AP Photo/David Zalubowski, file
A woman and her son wait as a light rail train arrives at the Broadway station in south Denver.
Denver’s public transit includes bus and light rail lines, as well as an airport shuttle service. The MallRide bus lines also transport passengers over the city’s mile-long 16th Street Mall for free, seven days a week. The city is also undertaking a multi-billion-dollar expansion of its transit system to increase light rail, commuter rail, and bus rapid transit lines.



