The car of the future

This car can drive itself from A to B. It's taking part in the Darpa Grand Challenge, a Pentagon contest for inventors to come up with self-driving vehicles - and the ideas are already starting to be used in today's cars.
On a quiet university campus across the water from San Francisco, an enthusiastic bunch of young computer boffins are working on what could be the car of the future.
"Sometimes we talk to it as if it's an unruly child," says co-team leader Ben Upcroft.
Another member of the team jumps out of the front seat, crosses the road and presses a red button on a box in his hand. "The RAV4 is going autonomous," he says into a radio.
The car moves, slowly forward, like a learner terrified of touching the accelerator. The steering wheel is turning. It is driving itself. The speed is frustratingly slow, and from time to time the car veers towards the verge.
But what's impressive is that no-one is sitting inside.
The Sydney-Berkeley driving team are entrants in the 2007 Darpa Challenge, to be held in October. Sponsored by the United States Government, which wants to develop driverless military supply vehicles for war zones, the challenge will end with a 60-mile race through a mocked-up "urban area". The most important rule? No humans allowed.
The location of the challenge hasn't yet been announced. But it's likely to be a US military base, with roads and intersections. More than 50 teams are in the running, with 30 expected to start the race.
Cars will have to navigate by themselves, avoid other cars, circumvent traffic jams, stop at junctions, follow road markings and give way when they're supposed to. A serious test for artificial intelligence. A future where your car is an obedient pet sounds fantastic. Unless you're the law firm of a motor manufacturer. Imagine if the auto-driver fails, and there's injury or death. Instead of the driver getting sued, the car company is in the dock. So much of this technology will be introduced gradually.
But there are other less obvious benefits. Children could be driven to school. The elderly and visually impaired could gain new mobility.