A39

A39 is a road designation used in several countries for major routes. The most widely recognized usage is the A39 road in the United Kingdom, where it functions as a long-distance route in the southwest of England. In the UK, the A39 runs through Cornwall as a coastal corridor that connects communities and links with other major roads, providing both local access and regional through traffic. The road consists of a mix of single and dual carriageway sections, and various upgrades over the years have aimed to improve safety, capacity, and journey times. It has historically supported tourism and freight movements along the coastal belt and through inland connections.

In addition to the United Kingdom, the A39 designation appears in other countries for their own highways. The exact routing, standards, and function of the A39 differ by jurisdiction. For example, some countries use a similar numbering convention for a regional or national autobahn or autoroute, with characteristics shaped by local transport planning and traffic demand.

Because road numbers can be reused in different systems, the term A39 may refer to multiple distinct routes depending on the country. When seeking specific details such as start and end points, length, or road type, it is important to consider the national or regional context to identify the correct A39.