In the 1970s, the tremendous growth that had taken place in the previous decade continued. By 1970, the village population had grown to 18,730. That same year, a second expressway, Interstate 290, opened on the eastern boundary of the village. This provided another link to Chicago and further enhanced its stature in the eyes of the region's many developers. The following year, Woodfield Mall opened in Schaumburg. During the remainder of the decade, Schaumburg experienced phenomenal commercial, industrial and residential development.