A combination of recordings from my Denver RTD rides and Union Station visits. Before my Denver adventure I read all kinds of raves about RTD. Honestly I found tram to be a hassle to get where I wanted. Their bus system looked like it would get me to Union Station faster and more directly. With RTD rail I had to transfer to another train in what I felt was a less than desirable neighborhood.
There was a decent amount of choice between rail and bus. At the time I found online and offline maps and information to be lacking and confusing. Things may have changed or been update since then.
Recorded March 31st 2017