The traffic cell also knows the rest of the vehicles with in the same vicinity and range.

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Instead, high-speed wireless access services can leapfrog the fiber lines directly to your computer and provide even higher rates of data transmission-- over the same CDMA network that's already in place to route cell phone traffic.

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During its first tour of London's roads, one of the Fuel Cell Black Cabs excelled in rush-hour traffic, with smooth and responsive acceleration provided by the fuel cell and electric motors.

ENGADGET: UK's first fuel cell-powered black cab hits the streets of London

In the short run, carriers have taken steps to manage spectrum more efficiently by splitting cell sites, offloading traffic onto local WiFi connections and upgrading back-haul networks.

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In the scenario that combined cell phones with the heaviest traffic, older people took several seconds longer to start crossing than the college students.

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The goal of the experiment was to see if GPS-enabled cell phones could improve the way traffic data is collected.

NPR: Cell Phones: A New Commuter Tool?

The increased cell-site density will give traffic planners much more flexibility to deliver high-capacity services than if the two companies operated separately.

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As satellite-based GPS becomes more ubiquitous in cell phones, the idea is that by figuring out the position and speed of a person's cell phone as it travels in a moving car, traffic data could be made available faster, cheaper, and in areas where it's hard to measure, like on rural roads or city streets, for example.

NPR: Cell Phones: A New Commuter Tool?