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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).
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).
Few roads might meet these requirements except some of the highest functional classification controlled-access highways such as freeways and autobahns. [ 114 ] Even if such criteria are met, the law must also exempt driver liability for maintaining clear distance ahead.
All E-Grade highways in Sri Lanka are access controlled, toll roads with speeds limits in the range of 80–110 km/h (50–68 mph). The network is to be expanded to 518.5 km (322.2 mi) by 2024. Operational (fully or partially): E01 Kottawa-Hambantota; E02 Kottawa-Kerawalapitiya; E03 Colombo-Katunayake; E04 Enderamulla-Kurunegala-Kandy
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 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]
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This is a list of toll roads in the United States (and its territories). Included are current and future high-occupancy toll (HOT) lanes, express toll (ETL) lanes, and hybrid systems. HOV, as used in this article, is high occupancy vehicle.