"tracks" means "railway tracks", but it is not likely to be literal; instead it is a reference to the idea that a railway line separates the good or affluent part of a town from the bad or poor part (as also in the expresssion "the wrong side of the tracks"), and Joshua was sent to the bad part.
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GPY"tracks" means "railway tracks", but it is not likely to be literalIt should be noted, however, that in the earlier history of the United States it was absolutely literal. For example, there used to be countless towns where anyone not racially white could only live on the other side of the (literal railway) tracks from the whites.