A good rule of thumb is to keep a distance of one car length, about 10 feet, for every 10 mph of speed, so at 40 mph, you should be 40 feet behind the car in front of you. Obviously, this is harder to do in heavy traffic.
20 yards
A safe distance, there is no defined limits of this type as driving near parked cars is situational (at best).
Six car lengths is a good distance.
One car length for every 10 miles per hour.
I always heard of the two second rule but I am not sure if that is law.
1m
one car length per 10 miles per hour
100 fy
you should give at least a foot of space...
it is recommende to keep a gap of at least two seconds behind the car in front of you so the distance varies with the speed
One car length for every 10 miles per hour of speed.
You should be 1 car behind for every 10 mph
Know your distance between cars, fire hydrants and railroad crossing. These are the most over looked.