A massive mobile Wi-Fi network that could be a model for many cities was launched in the city of Porto, Portugal, this fall. Buses and taxis are equipped with routers that serve as mobile Wi-Fi hot spots for tens of thousands of riders. The routers also collect data from the vehicles — and from sensors on trash bins around the city — and relay it back to city offices to help with civic planning.

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http://mashable.com/2014/12/28/portuguese-buses-and-taxis-wifi/