路肩是一种道路设施，通常见于高速公路上，设在道路旁边，供车辆发生故障或其他紧急事故需要停下时使用。在不少国家和地区，路肩亦充当紧急车辆（如救护车、警车）避开交通挤塞的信道。

路肩通常是指硬路肩，即是与常规道路一样铺上了柏油。另有一些道路因各种限制无法在路肩铺上柏油，称为软路肩。

路肩在中国大陆地区称为应急车道，加宽的部分被称为紧急停车带。

A shoulder, often serving as an emergency stopping lane, is a reserved lane by the verge of a road or motorway, on the right in countries which drive on the right, or on the left side in Japan, the UK, Australia, and other left-side driving countries. Many wider U.S. as well as Swedish freeways have shoulders on both sides of each directional carriageway, in the median as well as at the outer edges of the road, for additional safety. Shoulders are not intended for use by through traffic, although there are exceptions (see below).