4.6 meters or 15ft. is the estimated stoping distance of a vehicle travelling at 25 MPH.
Thinking time and weather or not you are sober have not been taken into account.
When traveling 30-mph, the braking distance is 45-feet, and the total stopping distance is 75-feet. This is the length of a semi-truck and trailer.
44feet
3 meaters
Stopping Distance = about 315 feet at 70 mph
1/2
Yes it will need the stopping distance of a automobile traveling at the same speed and then it will need a few hundred more feet as well.
23 meters in normal conditions
53 metres/ 175 feet
Stopping distance at 30mph = 23m
Stopping Distance = 15 feet
Stopping Distance = about 206.25 feet at 55 mph
The total stopping distance for a car travelling at 30 mph on a dry surface is about 75 feet. However, you may wish to note that in most countries, driving a car on the pavement is illegal.