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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 .
Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs. Some have special shapes, such as the octagon for the Stop sign, the triangle for the Yield sign, and the crossbuck for railroad crossings.
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 ...
Overtaking is prohibited either for all vehicles or for certain kinds of vehicles only (e.g. lorries, motorcycles). In the USA, this is usually phrased as "no passing zone" and indicated by a rectangular, black-on-white sign on the right side of the road that says "DO NOT PASS", and/or by a solid yellow line painted on the roadway marking the left limit of traffic (centerline), and sometimes ...
Other non-American countries using road signs similar to the MUTCD include Australia, Indonesia, Ireland, Japan, Malaysia, New Zealand, and Thailand. They, along with the US Virgin Islands , are also the only countries listed here which drive on the left —with the exception of Liberia and the Philippines (though partial), both of which drive ...
This is a comparison of road signs in countries and regions that speak majorly English, including major ones where it is an official language and widely understood (and as a lingua franca). Among the countries listed below, Liberia , Nigeria , and the Philippines have ratified the Vienna Convention on Road Signs and Signals , while the United ...
Through urban areas, at least one routing is to have 16-foot (4.9 m) clearances, but others may have a lesser clearance of 14 feet (4.3 m). Sign supports and pedestrian overpasses must be at least 17 feet (5.2 m) above the road, except on urban routes with lesser clearance, where they should be at least 1 foot (30 cm) higher than other objects.
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