Edgar Maddison Welch traveled from North Carolina to Washington, D.C., in 2016 and fired shots in Comet Ping Pong restaurant, acting on a conspiracy theory that had spread online. A homeless man suspected of attempting to start a fire with a “flamethrower” was bundled to the ground and zip-tied by Angelenos as wildfires continued to spread.

The best advice from officials this weekend is to travel only if necessary. Crews are focusing on bridges, overpasses and high-elevation areas, which tend to freeze first.

Our main focus will be on high-traffic spots like the I-55 and I-40 bridges, as well as the I-40 flyover,” a TDOT spokesperson said.

NDOT is gearing up for Friday's winter storm, pre-treating roads all across Nashville.

The preparations to make our roads safe are already underway. TDOT regional communications officer Mark Nagi shares how the agency is preparing.