built-up area
(road within a) settled area in which the speed limit of a road is nationally caped to 30 mph (48 km/h). These roads are known as 'restricted roads' and are identified by the presence of street lights
en-GB/ˈbɪlt - ˈʌp ˈɛəɹɪə/
en-US/ˈbɪlt - ˈʌp ˈɛɹiə/