The A3 Road is a major road in the United Kingdom that connects London to Portsmouth. It is approximately 70 miles long and serves as a key route for both local and long-distance traffic. The road passes through several towns and cities, including Guildford and Horsham, providing access to various amenities and services along the way. Originally constructed in the 18th century, the A3 has undergone numerous upgrades and improvements to accommodate increasing traffic volumes. It features dual carriageway sections, which help facilitate smoother travel. The road is also important for commercial transport, linking the capital to the south coast.