ok - I took some time to "learn" myself on the Fast-Track expansion schedule. For those who want a quick reference guide:
http://www.rtd-fastracks.com/media/maps/index.html
According to the plans - the West Corridor is the next phase that will be worked on:
Project Schedule
Jul 2008 - Construction begins on Denver Park Bridges
Aug 2008 - PUC application submitted
Aug 2008 - 100% Design
Nov 2008 - Full Funding Grant Agreement approved by Federal Government
Winter 2008 - Full Construction begins
Late 2012 - Construction complete
Early 2013 - West Corridor Opens
I'd be curious to know what is going on with the Bridges, which is apparently seeing some construction work right now. Edit: pictures of work done
Will there be elevated lines (like the southeast) or will it run alonside traffic (like the CBD)? According to the map - it mostly follows 12th - then 13th - then heads south to 8th - and then straightens out on 6th for the last 5 miles.
And to the previous poster who suggested a hypothetical budget of $50M per mile - I believe that only applies to Light-Rail, which I assume to be much more exensive than street car lines. If street cars are inter-mingled with traffic, the price is a lot cheaper.
FYI: for anyone who likes the layout of this message board - the North Metro Line for Fast-Tracks has a similar forum along with a moderator that can answer questions related to the line.
http://teamtoolslive.com/northmetro/forum/index.php
It's a pretty insightful forum - and makes me wonder why the other Rail Lines don't have one set up yet.