Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
Larry:
1. Yeah, becasue that's worked so well for LA, Atlanta, DC, etc.
2. This is a private investment and has nothing to do with the government.
3. The more info the better. Drivers can avoid slow traffic areas thus improving traffic in those areas by dispersing traffic more evenly (hopefully people will decide to not even drive at all).