just a note that there is a place for Light Rail and Commuter Rail in the OKC metro area ...

Denver is building 4 commuter rail lines in the next few years

the Gold line which is 11.2 miles .. has 8 stops and takes 25 min for the trip end to end

the East Line runs Downtown to DIA 22.8 miles 7 stops 35 min end to end ..

also the Northwest Rail line runs to Boulder/Longmont will be 41 miles and will run 61 min end to end ..

the North Metro Line will run from denver north 18.5 miles ..