expression
keep the distance; beware of the car in front
Fixed expression seen on road surface markings and signage, warning drivers to maintain a safe following distance to avoid rear-end collisions.
高速道路の路面に「追突注意」と書かれていた。
The road surface on the expressway had 'Keep the distance' written on it.
Compound of 追突 (rear-end collision) and 注意 (caution, warning). A modern traffic-safety phrase.