alt Hacker NewsThe speed limit example is a great one. Consider a road that has a 35mph limit. Now - which of the following scenarios is SAFER: a) I'm driving on the road in a brand new 4x4 porsche on a sunny day with great visibility and brand new tyres. Doing 40mph. b) I'm driving on the same road in a 70s car with legal but somewhat worn out tyres, in the dark, while it's raining heavily. Doing 35mph.
Of course technically option a is violating the law but no sane police officer will give you a fine in this case. Nor should they! A robot will, however. This is stupid.
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If there was an accident an officer might give you a fine in both cases where I live. In the Porsche case they can say you broke the law and were speeding that led to the accident. But also in the case of old car for failing to adjust your speed to your skills, the state of your vehicle and conditions of the road and weather regardless of the speed limit.
The Cayenne would be safer going 35 instead of 40 regardless of all other variables. It's a trivial physics question, kinetic energy is a function of mass and velocity.