SPRINGFIELD — A law shielding governments from liability on recreational trails really only applies to the roads less traveled, the state’s top court has ruled.The Illinois Supreme Court deemed part of a tort immunity law that applies to “[a]ny hiking, riding, fishing or hunting trail” grants immunity only for injuries that occur on “primitive, rustic or unimproved trails.”And the opinion, rendered late last month in Kathy Corbett v. County of Lake, could be a preview of the ruling in a …