Re:Tesla: Introducing Autopilot and Dual Motor All Wheel Drive
by mikeash on Friday October 10, 2014 @11:54AM
(#8438367)
And then there's the time to actually make your movements. Getting your foot onto the brake pedal and pushing on it takes appreciable time, both for the foot to make the movement and for the nerve impulses to get there to make it move.
I recall from looking into this stuff a bit that a good reaction time from "oh shit" to "brakes are applied" is around 750ms. Accounting for people who aren't fully on top of their game (distracted, tired, injured, old, etc.), road designers assume more like 1.5-2s delay for applying brakes. And even that will be optimistic in some cases, as many car crashes demonstrate.
Re:Tesla: Introducing Autopilot and Dual Motor All Wheel Drive
by nkrumm on Friday October 10, 2014 @12:31PM
(#8438623)
There's that, but also the realization that you need to brake "as hard as possible"-- we're not trained to do that often so there's additional delay before that happens.
I recall from looking into this stuff a bit that a good reaction time from "oh shit" to "brakes are applied" is around 750ms. Accounting for people who aren't fully on top of their game (distracted, tired, injured, old, etc.), road designers assume more like 1.5-2s delay for applying brakes. And even that will be optimistic in some cases, as many car crashes demonstrate.