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.
Lake, Milwaukee County, Wisconsin in 1938. It was to be the Lake City Hall and doubled as a water tower. This landmark features Art Deco details such as empire lines on the façade, scallops above the entrance and stair railings with chevron designs in them. No longer needed by the neighboring Department of Water Works treatment plant to equalize water pressure, the internal tank was abandoned and the building updated for use as municipal office space in 2001. In 1993, the Howard Avenue Water Purification Plant became the source of the Milwaukee Cryptosporidium outbreak, the largest documented waterborne disease outbreak in United States history.