Soviet Union and later Russia had entirely families of electric mainline freight locomotive https://en.wikipedia.org/wiki/VL85 https://en.wikipedia.org/wiki/VL8

Soviet Union and later Russia had entirely families of electric mainline freight locomotive https://en.wikipedia.org/wiki/VL85 https://en.wikipedia.org/wiki/VL85 If the line is electrified then freight travelling on it will be travelling on electric trains.