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A triangle showing a doubled-back bend.
Also known as: Sharp bend sign, U bend warning sign
The Indian cautionary sign warning of a hairpin bend on a hill road.
Warns of a hairpin bend, a turn severe enough to reverse the direction of travel.
Contexts: Road signage
Belongs to the hill-road group and is signed left or right handed, so the drawn loop matches the actual turn rather than standing for bends generally.
Contexts: Road signage
A bordered triangle containing a line that turns back sharply on itself, forming a narrow loop.