Final answer:
The sector model suggests that urban growth is patterned around transportation networks. It features wedge-shaped zones flanking industrial corridors along rail lines and highways.
Step-by-step explanation:
The sector model of human settlement suggests that urban growth is patterned around transportation networks such as railroads and highways. In this model, cities have wedge-shaped zones that cut across concentric rings found in the previous concentric zone model. The CBD remains in the middle, while working-class homes are commonly found flanking industrial corridors along rail lines and highways.