The A78 is a major road in Scotland that connects the city of Glasgow to the coastal town of Ayr. It serves as an important route for both local and long-distance traffic, facilitating travel and commerce in the region. The road is approximately 30 miles long and passes through various towns and scenic areas. The A78 is part of the larger network of roads in Scotland, contributing to the connectivity between urban and rural areas. It is often used by commuters, tourists, and commercial vehicles, making it a vital artery for the local economy and transportation system.