National Road 3 is a major highway in Romania that connects the city of Bucharest to the region of Transylvania. It serves as an important route for both local and international traffic, facilitating trade and travel across the country. The road spans approximately 300 kilometers and passes through several key cities, including Ploiești and Brașov. It is a vital infrastructure component that supports economic activities and tourism, making it essential for the connectivity of various regions within Romania.