These are the old British measures which haven't changed since th 1960's.
In modern vehicles far shorter stopping distances can be obtained.
Speed thinking stopping
20 mph 6 metres 6 metres
30 mph 9 metres 14 metres
40 mph 12 metres 24 metres
50 mph 15 metres 38 metres
60 mph 18 metres 55 metres
70 mph 21 metres 75 metres
Soure :- The highway code 1998
The equation that links stopping distance, thinking distance, and braking distance is given by: Stopping Distance = Thinking Distance + Braking Distance. Thinking distance is the distance a vehicle travels while the driver reacts to a hazard, while braking distance is the distance traveled while the vehicle comes to a complete stop after the brakes are applied. Together, they represent the total distance required to stop a vehicle safely.
The stopping distance at 55 mph varies based on factors like vehicle type, road conditions, and braking efficiency. On average, it takes about stopping distance of stopping distance of 200-250 feet to come to a complete stop, which includes both the reaction distance (the distance traveled while the driver reacts) and the braking distance. If you consider a reaction time of about 1.5 seconds, this adds roughly 120 feet to the total stopping distance.
At 20 mph, the average thinking distance is around 20 feet, while the braking distance is approximately 20 feet as well. Therefore, the overall stopping distance for a vehicle traveling at 20 mph would be around 40 feet.
Total stopping distance is the thinking distance (The distance it takes for your brain to process the event and decide to stop the car) and the stopping distance (The distance it takes to stop the car once deceleration has begun) added together.
Total stopping distance is the thinking distance (The distance it takes for your brain to process the event and decide to stop the car) and the stopping distance (The distance it takes to stop the car once deceleration has begun) added together.
The overall stopping distance would be around 122m (400ft) This is made up of a thinking distance of 24m (79ft) and an actual stopping distance of 98m (321ft). The thinking distance is around 3m for every 10mph of speed and the overall stopping distance is calculated as follows: 2x20 ft at 20mph 2.5x30 ft at 30mph 3x40 ft at 40mph 3.5x50 ft at 50mph 4x60 ft at 60mph 4.5x70 at 70mph 5x80 at 80mph = 400 ft james s
The distance and direction between starting and stopping positions is displacement.
Thinking distance refers to the distance a vehicle travels from the moment a driver perceives a hazard until they physically react, such as by braking. It is influenced by factors like reaction time and speed. A longer thinking distance can increase the overall stopping distance of a vehicle.
That distance is known as the total stopping distance, which consists of both the thinking distance (distance traveled while recognizing a hazard and reacting) and the braking distance (distance traveled from applying the brakes to coming to a complete stop). The total stopping distance can vary depending on factors such as speed, road conditions, and vehicle condition.
Stopping a vehicle from 20 miles per hour under good conditions typically requires about 60 to 80 feet, depending on the driver's reaction time and the vehicle's braking efficiency. The total stopping distance includes both the thinking distance (the distance traveled while the driver reacts) and the braking distance (the distance required to come to a complete stop). The figure of 186 feet seems excessively high for that speed under good conditions, as most estimates place it significantly lower.
Stopping distance at 30mph = 23m
Stopping Distance = 15 feet