Perception time is how long it takes for your brain to recognise a situation and understands that you need to stop. Usually this takes ¾ second but depends on the driver.
Reaction time is the time it takes to physically react to a danger by moving your foot from the gas pedal to the brake pedal. Average reaction time is ¾ second.
Braking Time is the time it takes a vehicle to stop from the time the brake is first applied until the vehicle actually stops.
According to the American Association of State Highway & Transportation Officials(AASHO), it takes an average driver 1.64 seconds to perceive and react to a roadside hazard.
Ninety Five percent of people react within 2.5 seconds.
Permission to use materials granted by State of Queensland,14 November 2016
The following table shows the distance needed to stop on a dry road in an average family car.
The following table shows the distance needed to stop on a wet road in an average family car.
Queensland State Government. 2016. Stopping distances on wet and dry roads. [ONLINE] Available at: https://www.qld.gov.au/transport/safety/road-safety/driving-safely/stopping-distances/graph/index.html. [Accessed 22 June 2017].
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