Highway beautification is

landscaping Landscaping refers to any activity that modifies the visible features of an area of land, including the following: # Living elements, such as flora or fauna; or what is commonly called gardening, the art and craft of growing plants with a goal ...

and control of the usage of the land by

highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

s. In the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

, highway beautification is subject the Highway Beautification Act, Section 131 of Title 23,

United States Code In the law of the United States, the Code of Laws of the United States of America (variously abbreviated to Code of Laws of the United States, United States Code, U.S. Code, U.S.C., or USC) is the official compilation and codification of th ...

(1965), commonly referred to as "Title I of the Highway Beautification Act of 1965, as Amended"."Section 131 of Title 23, United States Code (1965)"
The act placed restriction on billboard advertising along highways and removal or screening of junkyards.

References

Road infrastructure Highways {{Road-stub