soundjack
But yeah these speed sensitive red lights are common and I agree that they work pretty well. Social pressure is good for behavioral nudging. Reminds me of those led signs that show a sad face if you go over the limit on certain residential areas for example.
However I must say that nothing beats Belgium in speed radars. Especially in Flanders, there are so many of these damn Gatso speed traps... What really makes the whole thing work though is a very good system behind it. Here in Belgium, if you're caught by a speed camera, you'll get the fine within 2 weeks tops. In Portugal however you might not even get it because the pile of fines to process is too big and the system isn't prepared for it.
I can confirm the roundabout obsession too :) those can be really annoying but they sure slow people down.
I use screen a lot (yes I know, I should switch to tmux one day!) and shell integration doesn't seem to work properly with sessions inside screen. Works perfectly if I ssh directly. Is it going to be supported eventually or is this the ultimate signal for me to switch to tmux?