I read on itworld.com:
Companies such as Volvo and Mercedes are working on crash avoidance systems. Radar measures the distance to obstacles ahead of the car, and if one comes too close the system will warn the driver. If the driver fails to act in sufficient time to stop the car safely, the cars computer takes over and applies the brakes.
Is anyone working on making the cars respond sooner at colder temperatures, or when the road appears to be in slippery conditions? (car has less traction, etc.)