Stopping Distance = 15 feet
Stopping Distance = about 315 feet at 70 mph
Stopping distance at 30mph = 23m
Stopping Distance = about 146.25 feet.
Stopping distance at 40mph = 36m
Stopping Distance = about 75 feet.
Best to drop at least 10 MPH as your stopping distance has increased significantly.
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.
3 meaters
23 meters on a dry pavement.
A good rule of thumb is to take the mph times itself, ( mph x mph) and then divide by 10 to get the approximate distance in feet to stop any normally maintained vehicle. Individual results vary of course.
You should not be travelling on a pavement at 70 mph!
200 feet