After Three Cracks Were Discovered In A Heavily-Traveled Bridge On Interstate 81 In Greene County By Construction Crews, The Tennessee Department Of Transportation Has Announced It Will Closing Down The Bridge. Repair Work Will Be Done On The Northbound Lane At Exit 23 Beginning At 10 Pm Saturday Night And Continue Through Sunday Morning At 10 O’clock. During The Closure, Traffic Will Exit I-81 Via The Off Ramp, Be Allowed To Cross 11-E, And Then Returned To The Interstate On The Opposing On-Ramp.