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2. Gantry (transport) - Wikipedia

   en.wikipedia.org/wiki/Gantry_(transport)

   A gantry (also known as a sign holder, road sign holder, sign structure or road sign structure) is a traffic sign assembly in which signs are mounted or railway signals are supported on an overhead support. They also often contain the apparatus for traffic monitoring systems and cameras, or open road tolling systems

3. Pedestrian crossing - Wikipedia

   en.wikipedia.org/wiki/Pedestrian_crossing

   It also specifies signs and markings: the "pedestrian crossing sign" is on a blue or black ground, with a white or yellow triangle where the symbol is displayed in black or dark blue, and that the minimum width recommended for pedestrian crossings is 2.5 m (or 8-foot) on roads on which the speed limit is lower than 60 km/h (or 37 mph), and 4 m ...

4. Human billboard - Wikipedia

   en.wikipedia.org/wiki/Human_billboard

   In temperate and warm locations, sign holders can be employed year-round and their effectiveness has been amply demonstrated. For example, during the month of October 2006, nearly 8% of the 3,600 people who visited model homes in a housing development in Moreno Valley, California were directed there by human directionals. [ 5 ]