Milwaukee has two auxiliary Interstate Highways, I-894 and I-794. I-894 extends from the western suburbs to the southern suburbs, bypassing downtown. I-794 extends east from the Marquette Interchange to Lake Michigan before turning south over the Hoan Bridge toward General Mitchell International Airport, turning into Highway 794 along the way. Milwaukee is also served by three US Highways. U.S. Highway 18 (US 18) provides a link from downtown to points west. US 41 and US 45 both provide north–south freeway transportation on the western side of the city. The freeway system in Milwaukee carries roughly 25% of all travel in Wisconsin.
Milwaukee "inner-ring" suburbs. In the 1920s Chicago gangster activity came north to Milwaukee during the Prohibition era. Al Capone, noted Chicago mobster, owned a home in the Milwaukee suburb Brookfield, where moonshine was made. The house still stands on a street named after Capone. By 1960, Milwaukee had grown to become one of the largest cities in the United States. Its population peaked at 741,324. In 1960, the Census Bureau reported city's population as 91.1% white and 8.4% black. By the late 1960s, Milwaukee's population had started to decline as people moved to suburbs, aided by federal subsidies of highways. They