Because a truck is heavier than your car, it takes longer to stop than you do. If you drive closely ahead of a truck you are asking for trouble. If you have to stop suddenly, there is no way they are going to be able to stop as quickly as you, even if they see you stop. A truck may also roll right over you instead of just rear-ending you, and flatten your car like a pancake. Moral of the story - keep a safe distance from trucks!
maintain a safe cushion of space ahead and behind your vehicle
it is more difficult to see events ahead
sliding friction
Energetic, vital, go-ahead, lively, animated, high-powered, forceful
To help you see traffic ahead.
a driver behind your vehicle is trying to pass you
When a driver behind you is trying to pass.
your line-of-sight is greater than 30 seconds ahead
300 feet
the visibility
They have orbits at the distance of Jupiter and 60 degrees ahead of or behind it
You should scan ahead as far as you can see
the sea raven is behind
ahead
The opposite of ahead is behind.
Be prepared for sudden stops by keeping a cushion between you and the vehicle ahead
stay behind it.