The Architect - yeah, I realised that for an animation idea I have it would require hand animating loads of traffic on a multi lane road - tedious in the extreme! So creating a tool to do it for me could potentially be helpful to other animators in the future
As gster says you'll probably do things a lot better in a 2D app such as gimp or photoshop. You'd be surprised how quickly people pick up those programs.
Simon