The E-5 Highway, also known as the D-100, is a major roadway in Turkey that connects the city of Istanbul to Izmir. It is part of the European route E5, which is a significant transportation corridor in Europe and Asia. The highway facilitates both local and international travel, serving as a vital link for trade and tourism. The E-5 Highway runs parallel to the Marmara Sea and passes through several important cities, including Bursa and Sakarya. It features multiple lanes, rest areas, and service stations, making it a crucial route for commuters and long-distance drivers alike. The highway is well-maintained and plays a key role in the region's economy.