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Despite its name, the association represents not only highways but air, rail, water, and public transportation as well. [6] Although AASHTO sets transportation standards and policy for the United States as a whole, AASHTO is not an agency of the federal government; rather it is an organization of the states themselves.
The DMRB is used to design trunk roads such as the A20 in the UK. The Design Manual for Roads and Bridges (DMRB) is a series of 15 volumes that provide standards, advice notes and other documents relating to the design, assessment and operation of trunk roads, including motorways in the United Kingdom, and, with some amendments, the Republic of Ireland.
Code of practice for design of concrete bridges. BS 5400-5:2005 Steel, concrete and composite bridges. Code of practice for design of composite bridges; BS 5400-6:1999 Steel, concrete and composite bridges. Specification for materials and workmanship, steel. (This part of standard is replaced by BS EN 1090-2 (EN 1090-2) but remains current) BS ...
Longer bridges can reduce the width of both shoulders to 4 feet (1.2 m). Existing bridges can remain part of the Interstate system if they have at least 12-foot-wide (3.7 m) lanes with 3.5-foot (1.1 m) shoulder on the left and a 10-foot (3.0 m) shoulder on the right, except that longer bridges can have 3.5 feet (1.1 m) shoulders on both sides.
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). [4]
Highway engineering (also known as roadway engineering and street engineering) is a professional engineering discipline branching from the civil engineering subdiscipline of transportation engineering that involves the planning, design, construction, operation, and maintenance of roads, highways, streets, bridges, and tunnels to ensure safe and effective transportation of people and goods.
"50 Divisions" is the most widely used standard for organizing specifications and other written information for commercial and institutional building projects in the United States and Canada. [5] Standardizing the presentation of such information improves communication among all parties.
CFR Title 23 - Highways is one of fifty titles comprising the United States Code of Federal Regulations (CFR), containing the principal set of rules and regulations issued by federal agencies regarding highways. It is available in digital and printed form, and can be referenced online using the Electronic Code of Federal Regulations (e-CFR).