7. Denver-Aurora, Colo.
Transit coverage: 83.7 percent (12th highest)
Service frequency (minutes): 8.1 (10th lowest)
Jobs reachable in 90 minutes: 47.5 percent (10th highest)
Walk score: 60.4 (23rd highest)
Commuters who bike: 0.79 percent (16th highest)
Denver has bus service, light rail lines, and an airport shuttle service. The city is currently undergoing a multibillion dollar expansion of its transit system.