Cul-de-sac

A cul-de-sac /ˈkʌldəsæk/, dead end (British, Hong Kong, Canadian, American, South African English, and Australian English, Hiberno-English), closed, no through road, a close (British, Canadian, and Australian English), no exit (New Zealand English) or court (American, Australian English) is a street with only one inlet/outlet. While historically built for other reasons, one of its modern uses is to calm vehicle traffic.