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Burlington: Elsevier. Sedgwick, H. Space perception. Boff, L. Thomas Eds. Sensory processes and perception pp. New York: Wiley. Visual space perception. Goldstein Ed.
Malden: Blackwell Publishing. Sinai, M. Terrain influences the accurate judgement of distance. Sugovic, M.
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Presence Teleoperators and Virtual Environments, 17 , 91— Witt, J. Action-specific effects in perception and their potential applications. Journal of Applied Research in Memory and Cognition, 5 , 69— Woods, A. The various perceptions of distance: An alternative view of how effort affects distance judgments. Naohide Yamamoto 1 Email author 1. Perception distance is the distance your vehicle travels from the time your eyes see a hazard until your brain recognizes it.
Take a moment to memorize the definition for Perception Distance. This will very likely show up on your written exam. Braking Distance is the distance it takes to stop once the brakes are applied. Make sure you memorize the definition of braking distance as this will likely show up on your written exam.
You should also memorize braking time as well. This type of question is frequently asked on written exams. Understand that truck braking systems are designed for when the truck is fully loaded. An empty or very light truck will actually take longer to stop than a fully loaded and heavy truck.
At 55 mph this accounts for 61 feet traveled. Be sure to have reaction time and distance memorized. This will likely show up on your written exam. At 55 mph on dry pavement with good brakes, it can take a heavy vehicle about feet to stop. Remember, braking distance is only one of three parts of the total stopping distance formula. Be sure to memorize the entire stopping distance formula:.
Make sure you memorize the definition of Braking Distance as well as the time and distance it takes for a vehicle to stop once the brakes are fully applied. Reaction distance is the distance traveled from the time your brain tells your foot to move from the accelerator until your foot is actually pushing the brake pedal. This accounts for an additional 60 feet traveled at 55 mph.
Reaction distance is the distance you will continue to travel, in ideal conditions; before you physically hit the brakes, in response to a hazard seen ahead.
It is very important to memorize the definition of Reaction Distance as well as memorizing Reaction Time and the distance traveled at 55mph. Make sure you know the definitions and distances for each. Perception distance is The distance your vehicle travels, in ideal conditions; from the time your eyes see a hazard until your brain recognizes it.
To finish braking smoothly, release pressure on the brake pedal slightly and then reapply pressure on the pedal just before you come to a stop. If you must stop quickly, use threshold braking. This is applying the brakes without locking the wheels. This is where braking efficiency is at its maximum while still allowing you to steer your vehicle. If the wheels lock, release your pressure on the brake pedal slightly.
Applying the brakes hard enough to lock the wheels will cause a loss of steering control. Previous Table of contents Next.
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