whats the stopping distance traveling in a car at 30 mph, in feet or metres.?

Answer 1

The distance quoted by the highway code, (as has been pointed out) is 75 ft.
This is the same as it was 20 years ago, before they invented ABS.

If you are braking properly, I don't know if ABS will actually stop you any quicker, but I do get very annoyed with the advert they keep showing of a car sliding to a stop:
"If you are doing 30mph you would stop here, but if you are doing 40mph AND CAN'T DRIVE, you would stop here."
Also the crumpled girl: I'm sure they mean "If you slam on the anchors from 30mph and hit me there's an 80% chance I'll live"

Answer 2

There is no answer.

It is entriely situation dependent, make, model, road condition, weather etc

I think a 1963 Austin Mini, with the twin leadng shoe front brakes will manage about 24 feet, the 1955 Vincent Black Shadow motorcycle would do it in 18 feet, plus thinking distance.

We used to use a Taporley meter to measure G for the MOT test years ago, 63 to 83 Minis would often achieve over 1 G form 30. and throw the passenger forwards violently against the seat belts as the cold brakes grabbed, the BMC 1100s with Dics brakes were nowhere near as good at 30 but the mini brakes were poor above 60. Again for comparison Land Rovers struggled to achieve 0.5G

Cars have gotten heavier and tyres optimised for fuel economy are less grippy but longer lasting and dics brakes need to warm up before reaching peak operating efficiency, whereas drum brakes grab when cold, so about 32 feet is now normal for hatchbacks etc. 4 WDs are much worse about 40 feet while lorries are worse still especially down hill, again road grip is crucial rain doubles the distance, rain after a dry spell trebles it and Ice may mean push the distance to hundreds of feet.

There is an irony in that the safety lobby with their insistance on strength beams in doors roll over protection etc have increased car weights which have forced the use of larger brakes to compensate, which need more time to warm up which have increased stopping distances and made cars more dangerous.

For instance a 1984 2 litre MG Maestro weighs 975 KG while the average of similar size vehicles is now around 1220 KG
The new MINI is about 1100 KG, about twice the 1960s version.

ABS does not really help here but it is a sobering thought that the old Rover in the TV ad would have stopped long before hitting the kid if the ABS had been working

Answer 3

You need to be more specific than that. Depends of different factors such as the type of brakes, example, Anti-lock, Disk Brakes, now assuming that it is a regular breaking system about 3 feet would be the stopping time. And i just can not believe that people think the car at the speed of 30 mph would come to a halt at 75 feet, whats the use of braking if the car goes 75 feet, i guess we all would go BOOM! BOOM!

Answer 4

The quoted shortest stopping distance from 30mph is 75 feet/23 metres/6 car lengths.

Answer 5

Stopping Distance At 30mph

Answer 6

It depends on alot of different factors,,,,car weight,,tire size and pressure,,,road conditions,,,,,there is no definate distance,,,it's all in accordance with the test situations

Answer 7

Kind of depends on the condition of your brakes, tires and the type of road surface.

Answer 8

75'

Answer 9

go to site ....fill in numbers

http://hyperphysics.phy-astr.gsu.edu/hbase/crstp.html#c2