If you get a chance to read The Next American City's current issue (Spring 09), you might see something you recognize. They have an article on fantasy transit maps and one of the ones featured is a streetcar plan I created for the District of Columbia. My map appears on page 29.
For other potential "Transportation Futures", make sure to check out the maps I have made for the Washington/Baltimore and Atlanta regions. And don't worry, more are in the works. Feel free to comment on the maps, after all, I'd love to have your input. It might just make it into the next version.