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A trunk road is a major highway with a specific legal classification in some jurisdictions, notably the United Kingdom, Sweden and formerly Ireland. Trunk roads are planned and managed at the national-level, distinguishing them from non-trunk roads which are managed by local authorities.[1][2] Trunk roads are important routes usually connecting two or more cities, ports, airports and other places, which is the recommended route for long-distance and freight traffic. Many trunk roads have segregated lanes in a dual carriageway, or are of motorway standard.[1]
The term trunk road, or trunk highway, is sometimes used more generically to refer to other categories of major highway.
the Swedish Transport Administration is responsible for maintenance and traffic regulation within the entire national road network, and for investments and trimming measures within the national trunk road network. [...] Regional roads are state roads that are not part of the national trunk road network. Investments in these roads and state subsidies are planned by county administrative boards, regional independent bodies and municipal collaborative organisations