From  Chicago, IL:  Take I-90 west, exit Business 20 west, take 11th St. exit, turn left on Sandy Hollow Rd. heading west to Kishwaukee St., turn left at the light.  Rapid-Air is located on the right hand side after Research Pkwy. light intersection (if you run into the three way stop on Airport drive, you went too far south).

From Milwaukee, WI:  Take Hwy 43 to I-90 Beloit exit (heading east), exit Business 20 west, take 11th St. exit , turn left on Sandy Hollow Rd. heading west to Kishwaukee St., turn left at the light.  RapidAir is located on the right hand side after Research Pkwy. light intersection (if you run into the three way stop on Airport drive, you went too far south).