Route 40 now open, 51 south of Vandalia remains closed Vandalia, IL, USA / Vandalia Radio Todd Stapleton Dec 31, 2015 | 6:39 AM U.S. Route 40, between Vandalia and Bluff City, re-opened yesterday afternoon to traffic after waters receded. U.S. Route 51, from Route 40 to Country Road 900 North, remains closed this morning due to water on the roadway.