"A roads" are major roads in the United Kingdom that are classified as primary routes. They are designed to facilitate long-distance travel and connect cities, towns, and important destinations. These roads are usually wider and have higher speed limits compared to local roads, making them essential for efficient transportation. The "A" in "A roads" stands for "arterial," indicating their role in carrying significant traffic volumes. They are often marked with a green sign and can be single or dual carriageways. Examples of notable A roads include the A1, which runs from London to Edinburgh, and the A40, connecting London to Fishguard.