Heh. I've been ruminating about this thread for months, and now it's alive again...
I've been considering creating a couple quick wireframes for someone to flesh out as needed, based on what barriers are here at work:
1) The (in)famous 'Jersey Barrier,' That long, ugly, white thing you see alot in government and some business areas after 9/11. We have some water-filled versions in addition to the classic all-concrete variant. These are stationary barriers of course.
2) For the kickables replacement, what I call the 'Jersey Cone,' which is taller (3') and skinnier (6" cone base) than a normal cone. Good Luck balancing on that! They also have two white stripes near the top, made of reflective white tape.
3) Last but not least, the Bollard (another stationary item). This is a 2' x 2' concrete base with a 10" or so concrete-filled metal cylinder sticking out of it (usually to about 4'). This obviously is not designed to prevent avatar traffic, just look menacing.
There's lots more types of barriers here, with all the construction that's gone on recently. Just don't know how I'd implement all of them.
Yet...
--TSK