"D roads" refer to a classification of roads in the United Kingdom that are designated for local traffic. These roads are typically narrower and less busy than major routes, making them suitable for residential areas and rural locations. They often connect smaller towns and villages, providing access to local amenities and services. The "D" in D roads stands for "District," indicating their role in the local road network. While they may not be as well-maintained as primary roads, D roads are essential for everyday travel and can support various vehicles, including cars and bicycles.