I'd like to ask a relatively simple question – what would happen if we switched of traffic lights when we didn't really need them? I'd like to know from an environmental aspect what effect turning off the nations traffic lights would have towards saving electricity and reducing emissions. From a social point of view could the nation's road users manage with such a change? And from a technical innovation view point – could it and should it happen and if so how?
posted by SarahM on Sep 10, 2008 - 22 answers

How does the button on the pedestrian crossing lights work? Does it actually send some sort of signal to the traffic lights, or is it just a psychological thing? It seems rather random timing-wise.
posted by divabat on May 14, 2008 - 21 answers

Why do the traffic signals at a particular intersection have light-blocking louvers on them? [more inside]
posted by aerotive on Feb 21, 2007 - 10 answers

Traffic lights no longer flash in the wee hours. Why? [more inside]
posted by cincidog on Sep 5, 2005 - 23 answers

Wireless Filter. I'm trying to make a Linksys BEFW11S4 v4's Internet light stop flashing so insanely. It's affecting internet speed in a big, big way. [MI] [more inside]
posted by bonaldi on Jul 14, 2004 - 17 answers