Wireless Street Lamps For Traffic Monitoring
"It's a very simple concept. 'Take a lamp post, put electronics in it, send messages to other wireless devices, including other lamp posts.' You can link the lamp post to the Internet directly, if there's an internet connection available -- any sort of connection at all will do. High speed fibre is best, but if that's not available, then a satellite, or maybe a phone line nearby can be used. And if there's nothing at all, then ask the next lamp post if it has any Internet connection. It may do. If it doesn't, the next one may do; and so you go along the road until you find one that does. It takes fractions of a second to complete the chain; and once the chain is complete, any data you like can be sent down it."
Thanks to Slashdot