4 I may be wrong though
about 2 seconds
4
The recommended space between two vehicles should be at least three seconds under ideal driving conditions. This allows sufficient time to react to sudden stops or emergencies. In adverse weather conditions or when driving at higher speeds, increasing the following distance to four or more seconds is advisable for safety. Always adjust the distance based on road and traffic conditions.
Measuring safe cushion of space in seconds factors in both the speed of vehicles and reaction times of drivers, allowing for a standardized and more universal approach to determining safe following distances. This takes into consideration varying driving conditions and speeds, helping to ensure a safe distance between vehicles regardless of the specific situation.
In good weather and clear visibility, drivers should maintain a minimum following distance of at least three seconds to allow sufficient time to react to any sudden changes in traffic conditions. This distance should be increased during adverse weather or when driving at higher speeds.
5 seconds is official for skateboards and other sport vehicles.
21.5 seconds
Increase to four seconds.
0.81 seconds
It is 20 seconds.
-- 21.3 seconds -- 21.6 seconds -- 21.9 seconds ? ? ? ?
That depends on its initial velocity and its acceleration. V1 = V0 + a * t