Half a million pounds worth of technology is being driven around the UK to make a precise 3D map for self driving cars.
Two lasers, a 360 degree camera and GPS sensors form the virtual eyes to soak up every nook and cranny of country lanes to motorways.
Mapping agency, Ordnance Survey, are piecing together a virtual picture.
Experts say it's an extraordinary level of detail.
Driverless cars also need to react to the unpredictability of human behaviour.
But are people ready to trust self driving vehicles?
The AA have found many of their customers are yet to come round to the idea of self-driving vehicles, with only 16% saying they'd happily sit in a driverless car, and not be worried about what was going on.
The West Country is already leading the way in driverless car technology for older passengers.
Scientists at Bristol Robotics Laboratory, at the University of the West of England, are testing these vehicles on older adults because they could be the largest market.