In France, what is the name of the sign that marks the end of a built-up area?

In France, the sign that marks the end of a built-up area is the end-of-built-up-area sign. It normally repeats the locality name shown on the entry sign, with a diagonal red slash through it.

Built-up-area signs are important because entering a named settlement can change the applicable rules, including default speed limits and the road environment drivers should expect. The end sign tells drivers that the settlement boundary has been passed and that different outside-built-up-area rules may apply.

This sign is not the same as an end-of-speed-limit sign. A locality boundary can affect several rules at once, while a circular speed-limit sign ends or changes one particular restriction. Drivers should read the sign type and shape rather than relying only on the place name.

French signs often use black lettering on a white rectangular panel for locality names. The red diagonal bar is the visual cue that the named built-up area is ending.