Columbus Subdivision (160.230 road/160.320 dispatcher): The Columbus Subdivision is the former Chesapeake & Ohio main between Columbus & Toledo. Built in the mid-1800s by the Hocking Valley Railroad to get Hocking Valley coal to the docks at Toledo, the line is still heavily traversed by coal trains, although the coal now originates in West Virginia and eastern Kentucky instead of Southeastern Ohio. The line also hosts numerous manifest and automotive trains between Toledo/Fostoria and Marion, junction with the ex-NYC Cleveland-Indianapolis main line.
Columbus Line Subdivision (160.800 MHz): The Columbus Line Subdivision is the former New York Central main between Columbus and Galion, junction with the Cleveland-Indianapolis main. Built by the Cleveland, Columbus & Cincinnati Railway (later the CCC&StL, or Big Four), the line was part of the primary route between Cleveland and Cincinnati for NYC. Quite busy when part of Conrail, the line has diminished in importance under CSX, with most traffic to the north being routed via Ridgeway and Marion. The line still hosts several manifest and intermodal trains each day, as well as coal trains.
Sandusky District (161.190 MHz):
The Sandusky District is the former PRR Sandusky Branch, sold by PRR to Norfolk & Western in 1964 in preparation for the Penn Central merger and to allow N&W access to the Nickel Plate/Wabash lines acquired in October 1964. At the transfer, the line required major rehabilitation; N&W poured money and effort into the project and ended up with a first-class piece of railroad which was one of the critical links in their system. Still critical today, it remains the primary means for NS traffic from the mid-Atlantic East Coast region to reach the Great Lakes; it hosts well over 50 trains daily including locals and coal trains.