The Highway code typical stopping distances are as follows:20mph = 12 Metres or 3 car lengths30mph = 23 Metres or 6 car lengths40mph = 36 Metres or 9 car lengths50mph = 53 Metres or 13 car lengths60mph = 73 Metres or 18 car lengths70mph = 96 Metres or 24 car lengthsOf course, these should be adjusted based on the road condition and the stopping abilities of your vehicle.
Stopping distances brake.org.uk/assets/images/facts/stopping-distances.jpg Source: Department for Transport
Stopping distance
Classic advice gives an estimation of 53.34m. How wet the conditions are, how worn your tyres are, what type of surface youre travelling on, how tired you are.. Too many factors to give a definiteive answer, but the UK highway code says 53m for a car on dry, firm surface with an alert driver. Be advised that these are the stopping distances for a 1970 ford anglia with drum brakes. The stopping power of a modern car is far better; my Volvo S60 will emergency stop from 50mph in less than 20 metres, but this excludes thinking time, which can vary hugely depending on the driver
Stopping distances are increased on wet roads because water reduces the friction between the tires and the road surface, making it harder for the tires to grip and stop the car effectively when the brakes are applied. This reduced grip means it takes longer for the car to come to a complete stop compared to dry road conditions.
No - the stopping distance depends on the speed of the vehicle - it' not simply a case of 'doubling-up'.
23 meters in normal conditions
The UK Highway Code in discussing emergency stopping distances uses the average length of a car as about 4 m or 13 ft.
You must keep a distance that will allow you to come to a complete stop without hitting the vehicle in front. This distance will change depending on your speed, the stopping abilities of your vehicle and the road condition.The Highway Code lists the following typical stopping distances:20mph = 12 Metres or 3 car lengths30mph = 23 Metres or 6 car lengths40mph = 36 Metres or 9 car lengths50mph = 53 Metres or 13 car lengths60mph = 73 Metres or 18 car lengths70mph = 96 Metres or 24 car lengths
Longer stopping distances. A passenger car may weigh 3,000 pounds. A large truck may weigh 90,000 pounds. It is much harder to stop.
The stopping distance of a car increases.
Tyre grip, downforce, brake wear, driver reflexes, track conditions, car weight, atmosphetic pressure.....the list goes on