RTD Transportation RTD Visit Website 1600 Blake Street Denver, CO 80202-1399 (303) 299-2257 (303) 299-2363 (fax) About Map About The Regional Transportation District was created in 1969 by the Colorado General Assembly to develop, operate, and maintaina mass transportation system for the benefit of 2.92 million people in its service area. What's Nearby? Distance: 5 10 15 20 25 50 mi.
