The D-100 is a major highway in Turkey that connects the city of Istanbul to various regions across the country. It serves as a vital transportation route, facilitating the movement of goods and people. The highway is part of a larger network that enhances connectivity between urban and rural areas. Originally constructed in the mid-20th century, the D-100 has undergone several upgrades to accommodate increasing traffic. It features multiple lanes and various interchanges, making it an essential artery for both local and long-distance travel. The highway also plays a significant role in Turkey's economy by supporting trade and tourism.