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Vertical clearance: The minimum vertical clearance under overhead structures, such as bridges, is 16 feet (4.9 m), including both paved shoulders and an allowance for extra layers of pavement. 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).
The minimum vertical clearance is 5.4 metres (17 ft 9 in) for main roads and highways, and 4.6 metres (15 ft 1 in) for other local roads with road authority approval. For high and very high clearance roads, the values are between 5.9 metres (19 ft 4 in) and 6.5 metres (21 ft 4 in).
Furthermore, such road sections must be distinguished from other roads so that the driver could clearly and immediately know when he or she may or may not take such extended "assurance". Few roads might meet these requirements except some of the highest functional classification controlled-access highways such as freeways and autobahns .
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 ...
Dec. 18—WILKES-BARRE — PennDOT is monitoring area for road restrictions, closures, and updates due to storms in our region. PennDOT cautions motorists to never drive through flooded roadways ...
The code also defines the clearance that is shorter than the physical clearance to account for sag curves, bridge deflection and expected settlements with a recommendation of minimum clearance of 5 metres (16 ft 5 in). [2] In UK, the "standard minimum clearance" for structures over public highways is 16 feet 6 inches (5.03 m). [3]
Feb. 1—CHIPPEWA FALLS — Chippewa County Highway Commissioner Brian Kelley has seen first-hand the devastation done to a road when spring weight limit restrictions are ignored. Three years ago ...
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