From Peter Leach, Nercwys, Flintshire, UK
Discussion of cars becoming more autonomous extends to whether they benefit from back-seat drivers (2 February, p 16). But what of the additional electrical power the car needs to use to process this feedback? This load on a vehicle's battery is parasitical on its primary function as a means of transport. Could this be a limiting factor in the uptake of driverless vehicles?
