An "A-road" is a major road in the United Kingdom that is part of the national road network. These roads are designed for long-distance travel and connect cities, towns, and important locations. A-roads are usually wider and have higher speed limits compared to smaller roads, making them essential for transportation and commerce. A-roads are classified into two categories: primary and non-primary. Primary A-roads are marked with green signs and are intended for long-distance traffic, while non-primary A-roads are marked with white signs. Both types play a crucial role in the UK's infrastructure, facilitating the movement of people and goods across the country.