watch your step; slippery floor
A fixed warning phrase seen on signs, especially in stations, stores, or public areas, to caution about tripping or slipping hazards.
There was a 'Watch Your Step' sign on the station stairs.
On rainy days the floor gets slippery, so a 'slippery floor' announcement is broadcast.
Similar warning phrase, but 足元注意 focuses specifically on footing or where you step, while 転倒注意 warns about falling or tripping over.
Compound of 転倒 (falling over, tumbling) and 注意 (caution, warning). A straightforward modern warning phrase.