central reservation
英 [ˌsentrəl rezəˈveɪʃn]
美 [ˌsentrəl rezərˈveɪʃn]
n. (高速公路、州际公路等的)中央隔离带
牛津词典
noun
- （高速公路、州际公路等的）中央隔离带
a narrow strip of land that separates the two sides of a major road such as a motorway or interstate
柯林斯词典
- (主干道上的)中央隔离带，中央分离带
Thecentral reservationis the strip of ground, often covered with grass, that separates the two sides of a major road.
in AM, use 美国英语用 median, median strip