I recently looked up the progress of RTD’s FasTracks, are new names for lines. The system will be almost completed by 2018, with only Boulder/Longmont (B line) still outstanding. The extensions will depend on the ridership. I’m predicting they will be build sooner, rather than later.
B Line – Must be a priority to finish as soon as possible. US-36 is one of the most heavily commuted highways in Denver metro area.
L line – Connection to A line along with possible extension to N line should be the next priority. It will alleviate congestion around Union Station and give people multiple ways into downtown.
Joe the Explorer 