In 2011, over 11.8 million people visited the seven oases. These facilities in Illinois have gas stations (Mobil) with 24-hour automated car washes, fast food restaurants (McDonald's, Panda Express, Subway, etc.) and other various shops (such as Krispy Kreme, Starbucks, Coleman Distributors, and TravelMart). Oases also have automatic teller machines. Six of the oases are built as a bridge-restaurant, directly over the Interstate Highway they service. The oasis in DeKalb is the only exception, with the facility located along the southern (eastbound) side of Interstate 88, and a vehicle overpass allows westbound traffic to access a segregated parking lot and gas station along one side of the facility. All the oases provide free WiFi access for visitors. The oases have a drive-thru lane for the McDonald's. All oases, except for the Hinsdale and DeKalb oases, have Tollway Customer Service Centers, where I-Pass toll transponders are sold and serviced. The oases have a total of of retail space. As of 2009, the oases were 45 percent to 65 percent vacant. ISTHA has established a special task force to study the oases' future.