traffic calming

Từ điển Oxford Advanced Learner 8th

ˈtraffic calming f66 BrE NAmE noun uncountable (BrE)
ways of making roads safer, especially for people who are walking or riding bicycles, by building raised areas, etc. to make cars go more slowly

Word Origin:
[traffic calming] 1980s: translation of German Verkehrsberuhigung.