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A comment on Mercedes-Benz says Level 3 self-driving option ready to roll. Parent comment
1) Stopping distances go up as the square of speed, so 40mph has huge advantages over, say 70mph.
2) Survivability of accidents at 30-40 are way higher 70 (unless pedestrians are involved, in which case 30-40 is already too high.)
3) Radars and Lidars really can't see/classify things very well at the distances required to do comfortably stop for obstacles at highway speeds.
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1) Stopping distances go up as the square of speed, so 40mph has huge advantages over, say 70mph.
2) Survivability of accidents at 30-40 are way higher 70 (unless pedestrians are involved, in which case 30-40 is already too high.)
3) Radars and Lidars really can't see/classify things very well at the distances required to do comfortably stop for obstacles at highway speeds.