Town of Christiansburg issued the following announcement on March 10
On March 15-16, AEP will be conducting a pole replacement on Roanoke Street at the Falling Branch intersection from 9 a.m. to 3 p.m. The work will involve a westbound right lane closure at this intersection. Contractors will be cutting power to the traffic signal for approximately one hour; however, the signal will run on battery and will remain fully operational for the duration of the work.
Original source can be found here.