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The Stockholm Congestion Charging System, created by IBM has significantly improved access to the Swedish capital by halving queuing times on access roads to the city in the mornings. \n\nCity traffic is down by 18% and CO2 emissions in the inner city have been cut by between 14 and 18 percent. These are the results of the latest study on the system by the Stockholm City Traffic authorities.

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Getting stuck in traffic sucks. While traffic jams have an uncomplicated cause -- too many dang cars -- the solution isn't quite so simple; there's no getting away from them completely in the foreseeable future. While we wait for high-speed rail to come to the U.S., there's some good news that can help cut back on time wasted in traffic jams and carbon emissions. According to a new study, cars equipped with GPS navigation systems with real-time traffic info can save American drivers a hefty four days -- and 21 percent of their cars' carbon emissions -- a year.

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Does morning rush hour make you crazy? Are you sick of traffic?

The Intelligent Transportation Society of America (ITS America), in partnership with IBM and Spencer Trask Collaborative Innovations, has launched a global challenge to identify innovative ideas for combating transportation congestion.

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