We're based in DC and right now traffic flow is all the buzz. It turns out that sometimes adding more roads can actually make a traffic situation worse. There are lights and whole lanes that change function based on traffic flow.

There are cameras everywhere but all they are used for is checking for accidents radio personalities chattering about where its backed up. The most high tech measuring device in use is those goofy rubber hoses that they lay on the roads. High tech camera based flow monitoring would be huge. Predicting impending traffic jams before they're 10 miles long would be gold. The mind boggles at how much that real-time data would fetch.