looking for a link about traffic flow...search not helping

there was a thread awhile back and some people linked a page where some guy had been experimenting with following distances and correcting traffic waves. the search engine isnt helping much.

This one?
What is “rubbernecking”?
Particularly this post and the following discussion?

after posting and hopping in the shower I thought of googling for “traffic waves” and got the hit I was looking for. SCIENCE HOBBYIST: Traffic Waves, physics for bored commuters

thanks though,

Well, at least I gave you the same link.