Dead-end streets, also known as cul-de-sacs, are roads that lead to a closed loop or a dead-end. They are often used in residential areas to create a sense of privacy and reduce traffic flow. Synonyms for dead-end streets include no-through roads, blind alleys, culs-de-sac, and dead-end alleys. No-through roads are roads that do not lead to another street or a major thoroughfare. Blind alleys are closed at one end and lead to nowhere. Cul-de-sac is a French term meaning bottom of a sack which describes a road with a limited number of exits or entrances. Lastly, dead-end alleys are streets with a dead end and are often used for parking or access to the rear of properties.