From 2003 to 2005, an extensive renovation program of the oases was completed, which involved demolishing the old structures down to the bridge deck and replacing them with new buildings. Where in the previous buildings the views of the highways were blocked by the vendor restaurants, in the new buildings large expanses of glass are used to create a sense of openness, and to give patrons better views of the highway. The steel truss design also has greater roof height (nearly ) than the old buildings, which increases visibility for the oases. The architects for the project were Cordogan Clark & Associates. The gas stations were rebuilt with canopies to cover the gas pumps. The oases were redeveloped at no cost to the ISTHA or the Illinois taxpayers. The $95 million investment was provided by Wilton Partners of Los Angeles, California and ExxonMobil in exchange for a 25-year lease. Under the lease, Wilton would pay ISTHA a percentage of vendor sales with a minimum of $750,000 per year.