Gaimen50-question practice tests in the real exam formatIf your speed doubles, your braking distance also roughly doubles.
Answer: ✕ False
Explanation
Braking distance increases with the square of speed. At twice the speed, the braking distance becomes about 4 times as long; at three times the speed, about 9 times.
More questions on “Speed limits”
- The centrifugal force acting on a car in a curve grows in direct proportion to its speed.
- Stopping distance means the distance the car travels from the moment the brakes start to work until it comes to a stop.
- On a road wet with rain and with worn tires, both the free running (reaction) distance and the braking distance become at least twice as long.
- On rainy days, visibility is poor and the braking distance is longer, so it is good practice to keep about twice the following distance you would keep on a clear day.
- On snowy or icy roads, it is good practice to keep a following distance about 3 times what you would keep on a clear day.
- A steep uphill slope is a place where you must slow down (to a speed at which the vehicle can stop immediately).
Questions and explanations are written against Japan’s Road Traffic Act and the National Police Agency’s Rules of the Road. These are not official exam questions.