The three-dimensional flower bed plan of a commercial street

Quick answer：

A three-dimensional flower bed in a commercial street typically refers to an elevated garden feature designed to enhance the aesthetic appeal of the street. It usually includes various layers of plants, flowers, and possibly water features. The 'plan' refers to the design layout of this feature, outlining the placement of plants, pathways, and other elements. The design of such a flower bed would be influenced by factors such as space availability, environmental conditions, and the overall architectural style of the commercial area.