National Association of Broadcasters (NAB) has won a contract from the U.S. Department of Transportation to demonstrate to demonstrate and test BPS time delivery service to one of Dominion Energy’s power substations located in Fairfax, Virginia. As preparation of the test, NAB has been upgrading the two-tower leader-follower network (WHUT in Washington, DC as leader and WNUV at Baltimore, Maryland as follower) to be totally GNSS-independent. Accurate and traceable time will be delivered from NIST Gaithersburg to the leader station using a dark fiber link and White Rabbit modems. The leader station will send time to the follower station using its broadcast BPS signal. The leader station has cesium clock-based holdover capability to handle accidental loss of dark fiber connection.