On May 1, 2015, St. Louis-based Rain Tunnel Express Car Wash will open its fourth Illinois location at 12 Junction Drive West in Glen Carbon. This facility will be the seventh Rain Tunnel Express Car Wash operation in the St. Louis Metro Bi-State Area.

Since establishing its first location in Granite City in 1995, Rain Tunnel Express has grown to become one of the largest car wash operations in the St. Louis area, and is now ranked among the top 45 car wash operators in the United States. Other Illinois facilities are located in Edwardsville and Pontoon Beach, while Missouri locations can be found in Sappington, Sunset Hills, and on Tesson Ferry in South County.