Live Streaming Traffic Cams

[architect77]

I think this is pretty cool to watch:

Live streaming video of I-40 in Raleigh-Durham, NC:
http://www.wral.com/traffic/video/6763278/

[Truvelo]

California's cameras are also streamed live but without the annoying pre-roll advert.

[Revive 755]

IDOT has a couple near the river bridges in the St. Louis Metro:
http://www.stl-traffic.org/Default.aspx

However, the site seems to be pretty picky on the needed software to view the streaming video; all but the MLK Bridge camera don't wok on all but one computer I've used recently.