Notice how in the picture, the man moves the canoe by using the paddle to push off the water and propel the boat forward. The difference is, with a street canoe, you don't have any fucking water. You just keep hitting the concrete with your paddle, and its damn near impossible to move.
I know what you're thinking: 'ziek, i know its a little less convenient for you, but think of the environment. Granted, but without someone pushing you, its nearly impossible to move in a street canoe. A compromise might be taking a train or something.
Needless to say, I missed my plane. It took me 2 hours to get to O'hare from the Northern Suburbs: an hour and a half in the street canoe smacking the concrete in front of my house and then half an hour in the cab to the airport.