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As the city grew and annexed adjacent towns, problems arose with duplicate street names and a confusing numbering system based on the Chicago River. On June 22, 1908, the city council adopted a system proposed by Edward P. Brennan; [2] amended June 21, 1909. The changes were effective September 1, 1909 for most of the city. [3]
Larger signs, located at intersections with stoplights, also include the street's numerical position within Chicago's grid system. The modern color scheme of street signs in Chicago dates to the 1970s. Before this, street signs had generally been yellow with black text, which was phased out to standardize street signs internationally.
For instance, Chicago Heights has a 185th Street, set on the same numbering scheme. Chicago's numbered street system was established in 1911 by legislation that made Madison Street the base for the numbering of east–west streets, and State Street for north–south streets. [4]
In Chicago, a typical city block is 330 by 660 feet (100 m × 200 m), [2] meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities. In much of the United States and Canada, the addresses follow a block and lot number system, in which each block of a street is allotted 100 building numbers.
The Historic Michigan Boulevard District is a historic district in the Loop community area of Chicago in Cook County, Illinois, United States encompassing Michigan Avenue between 11th (1100 south in the street numbering system) or Roosevelt Road (1200 south), depending on the source, and Randolph Streets (150 north) and named after the nearby Lake Michigan.
Madison Street is a major east–west street in Chicago, Illinois. Prior to human intervention, the Chicago River emptied into Lake Michigan at the present day intersection of Madison Street and Michigan Avenue. [1] Madison Street and State Street, the intersection from which Chicago's numbering system is based.
Stony Island Avenue is a major street on South Side of the city of Chicago, designated 1600 East in Chicago's street numbering system. It runs from 56th Street south to the Calumet River. Stony Island Avenue continues sporadically south of the Calumet in the southern suburbs, running alongside the Bishop Ford Freeway, sometimes as a frontage road.
The original street numbering system followed the pattern of odd numbers on one side and even numbers on the other side of the street, with lower numbers towards the center of town and higher numbers further away from the center. The infill numbering system avoids renumbering the entire street when developments are modified.