The D-400 Highway is a major roadway in Turkey that runs along the southern coast, connecting the cities of Antalya and Mersin. It is part of the national road network and serves as a vital route for both local and tourist traffic, providing access to various coastal towns and attractions. This highway is known for its scenic views of the Mediterranean Sea and the surrounding landscapes. It facilitates trade and travel, making it an essential artery for the region's economy. The D-400 also connects with other important roads, enhancing connectivity across southern Turkey.