Why are some Texas highways called loops?

AUSTIN (KXAN) — Those driving in and around Austin are well versed in local highways, from Interstate 35 to MoPac Expressway. But why do some roadways have double names and are also called "loops"?Not every "loop" actually loops around a given area. I know — bear with us here.Under the Texas Department of Transportation's highway designation glossary, a state highway loop is a bypass that links two or more highways.Several highways in Austin have dual names, such as Loop 360 also bei