Chicago Limo Practice Exam Prep – Practice Tests & Study Guide

The highest numerical designation among the streets listed is 6800 N. Chicago's street system is based on a grid, with the coordinates of streets determined by their distance in blocks from State Street and Madison Street, which serve as the central reference points. As you move further north in the city, the numerical designation for north-south streets increases.

In this context, 6800 N indicates that this street is located further north than the others listed, which are 6400 N, 6000 N, and 5600 N. Each of these options represents a street that is progressively further south compared to 6800 N. Therefore, when identifying the highest numerical designation from the choices, 6800 N stands out as it has the greatest value, indicating its position furthest north on the numbering system. This understanding of the Chicago grid and numbering system is key to recognizing why 6800 N is the correct answer.