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11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
In many European countries the dark background with light coloured text version of the sign is intended for information only. [15] Poland uses white text on a green background (E-17a/E18a) to show the political boundary of a place as information and uses the black on white pictogram version (D-42/D-43) to designate the change of traffic rules.
The inscriptions on road signs are written in Spanish since it is an official language of Puerto Rico and is most widely spoken in Puerto Rico. [ 3 ] The suffix (D) in parentheses means "right", from Spanish derecha , while the (I) in parentheses means "left", from Spanish izquierda .
Road signs in Zambia are based on the SADC Road Traffic Signs Manual, [1] [2] [3] a document designed to harmonise traffic signs in member states of the Southern Africa Development Community. Zambia drives on the left .
A white background signifies the sign is permanent, while a yellow background signifies that the sign is temporary. Warning signs are an upwards-pointing red triangle and contain a black pictogram describing the danger or obstruction. Speed limit signs are a red circle with the limitation in black. South Africa drives on the left.
Median width: The median should have a width of least 50 feet (15 m), and preferably 60 feet (18 m), in rural areas, and 10 feet (3.0 m), plus a barrier, in urban or mountainous areas. Recovery areas : There should be no fixed objects in the clear zone , the width of which should be determined by the design speed in accordance with the current ...
The alignment is the route of the road, defined as a series of horizontal tangents and curves. The profile is the vertical aspect of the road, including crest and sag curves, and the straight grade lines connecting them. The cross section shows the position and number of vehicle and bicycle lanes and sidewalks, along with their cross slope or ...