English to Greek Other Automotive / Cars & Trucks slogan translation

This is the slogan used on car sticker´s attached to the back window of a car, in order to warn the drivers behind the car to keep a certain distance to avoid a car crash.
I dont know equivalent translation in Greek.

Your translation should be popular and must have many car stickers or pictures displayed if you search from Google. Client would prefer some formal car sticker translations for this term.

Thanks for any input !
Regards