What is meant by a blacktop in Katy song Last Friday Night?

The Katy Perry song "Last Friday Night (T.G.I.F.)" mentions a "blacktop," but it does not have a specific literal meaning in the context of the song. In general, the term "blacktop" can refer to the paved surface of a road and could figuratively imply the street where the character in the song is dancing on Friday night during a night out with friends.