What is "signposts"

Usage examples of "signposts".

Her kind heart went out to patients who, for the first time, arrived for treatment and wandered in bewilderment all over the place, despite the little signposts none of them ever saw, until someone took pity on them and showed them the way, to arrive, hot and flustered, late for their appointment.

Not suitable for cars, she decided, and probably too unimportant to have signposts either.

Tantalising glimpses of villages with small houses bordering the road, signposts which she never quite managed to read as they tore past, and now and then the lights of villas standing back from the road.