Do you mean in the tiles, not props? There are “sidewalk” tiles with bright blue dashes and dotted lines, these are just meant to be fancy sidewalk “tech” like lighting or to suggest networking running through everything.
There are also road-paint tiles that are either weathered (chipped, broken up) or clean (no breaks, just clean lines) that are meant for roads, yes.
I probably should have included the sidewalk tiles as part of a mockup to demonstrate their purpose more clearly but I hope this answers your question!