The A3 Highway is a major road in the United Kingdom that connects the city of London to the port city of Portsmouth. It spans approximately 70 miles and serves as a vital route for both local and long-distance traffic, facilitating travel and trade. The highway passes through several towns, including Guildford and Havant, and is known for its scenic views, particularly in the Surrey and Hampshire regions. It is an important artery for commuters and commercial vehicles, contributing significantly to the economy of the areas it traverses.