IBM is helping reduce traffic congestion in major cities worldwide.
"Tired of traffic jams? See what IBM is doing to ease traffic snarls in Stockholm" (Greater IBM Connections e-magazine) talks about a system IBM built for the Swedish Road Administration to bill drivers by how much they drive in Stockholm. Sensors track when cars enter and exit zones in the city and send the owner a bill based on mileage and time. This encourages drivers to use the roads less and use them at off-peak times, and use mass transit more. You can read about it more in "Sweden Votes to Adopt City-Wide IBM Road Charging Solution in Stockholm" (press release) and "IBM Continues to Help City of Stockholm Significantly Reduce Inner City Road Traffic" (press release). IBM is working to develop similar systems for London, Singapore, and Brisbane.
Traffic congestion management systems are an example of what IBM means when we talk about developing a Smarter Planet, and an example of some real systems IBM is already doing. The idea is to leverage technology to help make our societies work better.
Smarter Planet: Traffic Congestion Management