Where are the wrong side of the tracks?

Answer 1

The "wrong side of the tracks" refers to the fact that in the United States, poor people's neighborhoods, the shanties and flop houses of laborers are generally not located near the nicer neighborhoods where the factory owners and shop-keepers live, and in fact are often separated from them by the railroad tracks, which were the economic life-line of the previous century. Thus the wrong side of the tracks is the part of town where the poor people live.