4 ms·

It's absolutely not nonsense, I suggest taking some basic high-school physics. Reaction time is the time for the vehicle to come to a stop, not for the driver t

It's absolutely not nonsense, I suggest taking some basic high-school physics. Reaction time is the time for the vehicle to come to a stop, not for the driver to first notice an issue. At 60 mph it will take many meters and seconds to deaccelerate, assuming the driver can take exactly the correct action: https://www.wolframalpha.com/input?i=time+to+brake+at+70+meters https://www.wolframalpha.com/input?i=time+to+brake+at+70+met... Estimate here is about 4 seconds, under perfect conditions. 5 seconds is more than reasonable, considering you also need to realize the other driver is acting erroneously.

frumper 4y ago
he said 5 seconds to START braking
- smaudet 4y ago
  I did not interpret their comment that way. That would be unreasonable, however their comment included mention of physical break distance, so I'm pretty certain they didn't mean actual human response time and instead how long it takes for a human to respond and slow the car, which is the metric of interest here. Even for a robot with millisecond response times, you will be breaking in the multiples of seconds, not instantaneously. Observation "reaction time" really is completely irrelevant here.
  - frumper 4y ago
    > It takes humans up to 5 seconds to even start breaking in the presence of danger. That seems pretty clear. 5 total seconds is really reasonable. 5 seconds before you start is silly.
mikestew 4y ago
Reaction time is the time for the vehicle to come to a stop You seem to have your terminology confused. Reaction time doesn’t even necessarily have anything to do with driving. I suggest a quick web search next time before assigning people remedial physics.
- smaudet 4y ago
  And I suggest you look into the concept of contextual terminology
jjav 4y ago
> Reaction time is the time for the vehicle to come to a stop, not for the driver to first notice an issue. No, reaction time means the time from noticing the need to brake to the time brake pressue is getting applied.
- smaudet 4y ago
  I disagree - reaction time is commonly referring to the reaction time of the vehicle in these events, the propensity of software devs to treat everything like a video game non-withstanding.

frumper 4y ago

he said 5 seconds to START braking

smaudet 4y ago
I did not interpret their comment that way. That would be unreasonable, however their comment included mention of physical break distance, so I'm pretty certain they didn't mean actual human response time and instead how long it takes for a human to respond and slow the car, which is the metric of interest here. Even for a robot with millisecond response times, you will be breaking in the multiples of seconds, not instantaneously. Observation "reaction time" really is completely irrelevant here.
- frumper 4y ago
  > It takes humans up to 5 seconds to even start breaking in the presence of danger. That seems pretty clear. 5 total seconds is really reasonable. 5 seconds before you start is silly.

mikestew 4y ago

Reaction time is the time for the vehicle to come to a stop You seem to have your terminology confused. Reaction time doesn’t even necessarily have anything to do with driving. I suggest a quick web search next time before assigning people remedial physics.

smaudet 4y ago
And I suggest you look into the concept of contextual terminology

jjav 4y ago

> Reaction time is the time for the vehicle to come to a stop, not for the driver to first notice an issue. No, reaction time means the time from noticing the need to brake to the time brake pressue is getting applied.

smaudet 4y ago
I disagree - reaction time is commonly referring to the reaction time of the vehicle in these events, the propensity of software devs to treat everything like a video game non-withstanding.