“Toll free in ’73.” That was the campaign slogan over five decades ago that promised tolls on Illinois interstates would be a temporary revenue sources. Today, the tolls are higher and the tollway authority is more permanent than ever. Lawmakers promised tolls would help fund 186 miles of interstate construction and would be removed when the roads were paid off. After that, highway maintenance would be funded by the gas tax. In 1968, the General Assembly made the Illinois Toll Highway Authority permanent. What started at just 10 cents at the exits and 25 cents at the plazas has grown...