An issue with very fast vehicles is that it is easy to accelerate to speeds that are very dangerous for the driver and other road users. With a vehicle with lets say 300+bhp at hand it is too easy to overstep the 'safe for the conditions' mark and cause a terrible accident, and in light of this I propose
using a haptic feedback actuator on the accelerator control.
Using a combination of laser and radar (for traffic density), roadmaps (urban area detection) and road surface monitors (to detect for wet conditions or loose gravel), and of course the standard equipment (tachometer, speedometer, gear sensor, accelerometer, traction control etc.) - all managed by an on board computer - the system would regulate the stiffness of the accelerator in order to prevent a careless driver from reckless driving.
The accelerator would still be completely depressible, and maximum acceleration could still be achieved even in precarious situations, however as the driving conditions become more dangerous, the driver is forced to press the accelerator much harder in relation to the how dangerous the conditions are.
Essentially the Haptic Accelerator Pedal would 'self-regulate' the vehicle from achieving speeds that are inappropriate for the conditions - regardless of the reckless intent of the driver.
Obviously a driver with very strong legs might be able to overcome the resistance of the accelerator and drive recklessly anyway - therefore the accelerator resistance can be adjusted (pre-drive) in order to suit the drivers physical leg strength.
Since speed is the main factor in fatal accidents the majority of the time, this simple Haptic Accelerator Pedal may contribute to fewer accidents and less devastating consequences of high speed collisions.
Of course such a system would be optionally over-ridable however this would be factory installed and cost a lot of money (even for super wealthy) and an inconvenience to by-pass.
Presumably another benefit of such a system would be for driver training purposes.