http://www.ibm.com/smarterplanet/us/en/transportation_systems/overview/index.html?cmp=usbrb&cm=v&csr=agus_cstransportvid-20101208&cr=dailymotion&ct=usbrb301&cn=transport_vid5
Smart traffic systems create smarter cities. IBM worked with the City of Stockholm to implement smart toll systems that cut gridlock by 20% and saved the citizens both time and money.