In 1973 , the citizens of Nebraksa embarked upon the Nebraska I-80 Bicentennial Sculpture Project, which provided large roadside sculptures along Interstate 80. A controversial project, referred to as an outdoor sculpture garden, it was completed in 1976 as a lasting commemoration of America's Bicentennial, The sculptures are interspersed for approximately five hundred miles throughout the state and located on alternate sides of the expressway at roadside rest areas.