Ogilvie campaigned vigorously for successful voter approval of the Illinois Constitution of 1970. He improved management of the Illinois State Fair, and in so doing eliminated irregularities in the handling of concession contracts. Ogilvie established the Illinois Department of Corrections to modernize the state penal system. He directed an expanded role for the Illinois Housing Development Authority, a key agency for combating urban decay. He also established the Illinois Department of Local Government Affairs to assist or advise county and municipal officials in the discharging of their duties. In addition, Ogilvie created the Illinois Department of Law Enforcement to revamp the state's policing functions; set up under the Illinois Bureau of Investigation, the state's "Little FBI". He broadened the scope of gubernatorial press conferences by allowing broadcast media to join the print media in coverage of the sessions. He also established the Illinois Environmental Protection Agency to protect air and water resources. One of the first comprehensive environmental protection agencies in the nation, the Illinois EPA became a model for the U.S. Environmental Protection Agency. Ogilvie set up the Illinois Department of Transportation, obtained legislative approval for a major upgrading of the state’s highway network, and built the East-West toll road linking Chicagoland to Western Illinois.