Not to completely bust y'r chops at all, however you need to know about riding the TRAIN. You have to get a card. There are tickets involved. Once you get the bicycle card to transport your bike on the train you note, "NO motorized bicycles allowed." Reason, well, start with LIPO and proceed to errant switching, etc. They don't allow any such conveyances b/c, they're dangerous on a train.
In 2007, I wrote for a variance to the powers that be, and they gave me one to use my Ebike. Yes they did! B/c I proved to them that upon loading, the battery itself was NOT anywhere on the bike. It was in a backpack. So, I had to remount it before and after every train trip, away from the property. That works fine if your rig has a removable battery.
Still, with all the inconveniences of a bicycle, 8-15 mph adds up to saving money and time. If you look at the freeway at rush hour you'll see the whole vision of an efficient bustling America going right down the tubes. Progress has fallen in on itself, anytime the whole traffic mass is below 8mph.
So be encouraged. Ebikes can help, but not as much as you would want them to in Denver, in 2012. We still have to share routes with non bikers 24/7. BTW the Bike lanes I understand to be 4X what they were in 2005, 1200 miles and counting, so go get y'r helmet and an energy bar and enjoy.