# Thread: Reaction time!

1. ## Reaction time!

I was wondering what the average reaction time is from when the time a person's rd goes off to the time the breaks are applied to the actual slowing of the vehicle. I have seen some things in the past in different areas on the internet but wanted to bring it to the members of this forum to debate it out. Mk

2. ## Re: Reaction time!

Originally Posted by proudNMAmember
I was wondering what the average reaction time is from when the time a person's rd goes off to the time the breaks are applied to the actual slowing of the vehicle. I have seen some things in the past in different areas on the internet but wanted to bring it to the members of this forum to debate it out. Mk
# Expected: the driver is alert and aware of the good possibility that braking will be necessary. This is the absolute best reaction time possible. The best estimate is 0.7 second. Of this, 0.5 is perception and 0.2 is movement, the time required to release the accelerator and to depress the brake pedal.

# Unexpected: the driver detects a common road signal such as a brake from the car ahead or from a traffic signal. Reaction time is somewhat slower, about 1.25 seconds. This is due to the increase in perception time to over a second with movement time still about 0.2 second.

# Surprise: the drive encounters a very unusual circumstance, such as a pedestrian or another car crossing the road in the near distance. There is extra time needed to interpret the event and to decide upon response. Reaction time depends to some extent on the distance to the obstacle and whether it is approaching from the side and is first seen in peripheral vision. The best estimate is 1.5 seconds for side incursions and perhaps a few tenths of a second faster for straight-ahead obstacles. Perception time is 1.2 seconds while movement time lengthens to 0.3 second.

From http://www.visualexpert.com/Resources/reactiontime.html

If you wanrt to know your reaction time:

http://www.getyourwebsitehere.com/jswb/rttest01.html

3. I call bull****, if I see brake lights come on I can be on the brakes in a lot less than 5/4's of a second...

4. When drunk - It usually takes the blinding of the blue & red lights for me to hit my brakes.

5. Originally Posted by Won Hunglo
When drunk - It usually takes the blinding of the blue & red lights for me to hit my brakes.
well you shouldn't be driving drunk, much less at a high rate of speed.

6. ## Re: Reaction time!

Originally Posted by venexoz
If you wanrt to know your reaction time:

http://www.getyourwebsitehere.com/jswb/rttest01.html
My best was .187

7. Got me beat, mine was .23

8. Wow, I'm old and slow. .17 best .18average. 1.2 seconds doesnt seem that far off to react then.
Just sitting and looking with my finger on the mouse takes almost a fifth of a second. Could easily use another second to look, think and finally move my old heavy foot.

9. Idon't apply the brakes without knowing where the signal is coming from first heck if the cop is behind and i get on my brakes it's obvious that i have a detector...not what i want the cop to know

10. ## Re: Reaction time!

Originally Posted by amoney
Originally Posted by venexoz
If you wanrt to know your reaction time:

http://www.getyourwebsitehere.com/jswb/rttest01.html
My best was .187
lol.. same here!

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