<P> The two - second rule is useful as it can be applied to any speed . It is equivalent to one vehicle - length for every 8 km / h ( 5 mph ) of the current speed , but drivers can find it difficult to estimate the correct distance from the car in front , let alone to remember the stopping distances that are required for a given speed , or to compute the linear equation on the fly . The two - second rule gets around these problems , and provides a simple and common - sense way of improving road safety . </P>
<P> The two - second rule is useful as it can be applied to any speed . It is equivalent to one vehicle - length for every 8 km / h ( 5 mph ) of the current speed , but drivers can find it difficult to estimate the correct distance from the car in front , let alone to remember the stopping distances that are required for a given speed , or to compute the linear equation on the fly . The two - second rule gets around these problems , and provides a simple and common - sense way of improving road safety . </P>
what is the safe distance to keep when following another vehicle
what is the safe distance to keep when following another vehicle
one vehicle - length for every 8 km / h ( 5 mph ) of the current speed
one vehicle - length for every 8 km / h ( 5 mph ) of the current speed