H Street Streetcar + Streetscape Mockup
John Reinhardt of the Grown in the City blog did this streetcar mock up for H Street, in response to the entry on Sunday.
Another good photo to take a crack at modifying would be this one, from Frozen Tropics
Years ago, Arlington created a video mockup, but I don't recall DC doing something similar. It's important to do this, because most people have a hard time picturing-imagining change.
-- Huge video download of the Pike Transit Columbia Pike streetcar simulation. I can't seem to find it on the PTI website.