A guidepost is a white timber or plastic post fitted with delineators that is used to mark and delineate roadside hazards, road widths, alignments and structures. They should be installed at a uniform distance from the edge of the road.
Guide posts are spaced closely together on curves, and further apart on straight sections of road. A set of two closely spaced guideposts often signifies the presence of a culvert under the road.
Australian Standard AS 1742.2 "Manual of Uniform Traffic Control Devices, Part 2: Traffic Control Devices for General Use", and Austroads Part 8 "Traffic Control Devices" contain information on guide post placement.
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