What is the name of a road ending in a circle?

A road that ends in a circle is referred to as a cul-de-sac. This term is derived from the French language, meaning "bottom of the bag," which aptly describes the road's shape where it terminates in a circular area or a bulb. Such road designs are often utilized in residential areas to create a defined and safe space for vehicles to turn around without the need for backing up.

Cul-de-sacs offer several advantages, including reduced traffic flow and increased safety for pedestrians, particularly children, as they often limit through traffic and minimize exposure to speed. Moreover, neighborhoods with cul-de-sacs tend to foster a sense of community and provide a more tranquil environment as the design encourages a low-traffic atmosphere.

While roundabouts, dead-end roads, and loop roads serve different purposes in traffic flow and urban design, they do not specifically describe a road that concludes in a circular form as a cul-de-sac does.