安全岛，又称交通岛、分隔岛，是一种行人过路设施，位于马路的中央或快车道与慢车道之间，供行人暂避车辆并分隔两方向或快慢车道。而一些安全岛会设有两个安全岛灯（英语称为Bollard），分别在安全岛的两端，提醒司机闪避，以确保岛上行人的安全。部分安全岛上，还配合交通号志或斑马线使用，以控制道路的交通流量，增加过路行人的安全。

位于美国纽约,又称分隔岛国家公园

The median strip or central reservation is the reserved area that separates opposing lanes of traffic on divided roadways, such as divided highways, dual carriageways, freeways, and motorways. The term also applies to divided roadways other than highways, such as some major streets in urban or suburban areas. The reserved area may simply be paved, but commonly it is adapted to other functions; for example, it may accommodate decorative landscaping, trees, a median barrier, or railway or streetcar lines.