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A struck-through U-shaped arrow forbidding a reversal.
Also known as: U-turn prohibition, No turning back sign
A U-shaped arrow inside a prohibitory ring forbids turning back on the same road. In some jurisdictions it also forbids a three-point turn and in others it does not, so the sign's exact scope is a local legal question rather than an international one.
Forbids a U-turn at or beyond the sign, drawn as a U-shaped arrow within a prohibitory circle.
Contexts: Road signage
Varies in scope between jurisdictions on whether it also forbids other means of reversing direction, which is a matter of local traffic law rather than of the sign.
Contexts: Road signage
An arrow curving back on itself in a U shape, drawn inside a circle with a red border and crossed by a red bar.