Cityscape thumb|Illinois State Capitol and East Capitol Avenue in 2019 Springfield proper is largely based on a grid street system, with numbered streets starting with the longitudinal First Street (which leads to the Illinois State Capitol) and leading to 32nd Street in the far eastern part of the city. Previously, the city had four distinct boundary streets: North, South, East, and West Grand Avenues. Since expansion, West Grand Avenue became MacArthur Boulevard and East Grand became 19th Street on the north side and 18th Street on the south side. 18th Street has since been renamed after Martin Luther King Jr. North and South Grand Avenues (which run east–west) have remained important corridors in the city. At South Grand Avenue and Eleventh Street, the old "South Town District" lies, with the City of Springfield undertaking a significant redevelopment project there.
Cityscape thumb|Illinois State Capitol and East Capitol Avenue in 2019 Springfield proper is largely based on a grid street system, with numbered streets starting with the longitudinal First Street (which leads to the Illinois State Capitol) and leading to 32nd Street in the far eastern part of the city. Previously, the city had four distinct boundary streets: North, South, East, and West Grand Avenues. Since expansion, West Grand Avenue became MacArthur Boulevard and East Grand became 19th Street on the north side and 18th Street on the south side 18th Street has since been renamed after Martin Luther King Jr. North and South Grand Avenues (which run east–west) have remained important corridors in the city. At South Grand Avenue and Eleventh Street, the old "South Town District" lies, with the City of Springfield undertaking a significant redevelopment project there.