low traffic neighbourhood       
noun [ C ] UK (also low-traffic neighbourhood) uk/ˌləʊ ˌtræf.ɪk ˈneɪ.bə.hʊd/ us/ˌloʊ ˌtræf.ɪk ˈneɪ.bɚ.hʊd/ (abbreviation LTN)
 (城市居民区内的)低车流量区域
an area where vehicles cannot travel on certain residential roads (= roads where people live), created in order to reduce the general level of traffic in that area
  Councils across the UK have been introducing more low traffic neighbourhoods.  英国各地的当地政府都在推广建立低车流量区域。 
 Low-traffic neighbourhoods aim to make the character of residential streets more pleasant and safer for people to walk and cycle.
 - More examples
 - A low traffic neighbourhood is an area which is closed off to through-traffic – so you can drive to it but can’t drive through it.
 - Quiet streets in low traffic neighbourhoods make it safer to transport young children on cargo bikes.
 - For every low traffic neighbourhood there will be a high traffic one, unless there are viable alternatives to driving including safe cycle routes.