at the side of the road还是 on the side of the road还是两个都行?

问题描述:

at the side of the road还是 on the side of the road
还是两个都行?

我觉得on比较好,at在口语中应该也不算错

后者

两个都行
at the side of the road ( at 路上的一处固定地点)
on the side of the road ( on 一条路的上面 )