Electric locomotives ideal but be careful about speed

I highly doubt whether it would be safe for cargo trains to move at 120 km/hour. Cargo trains I have seen in USA and Canada can be as long as two kilometers.
Trains at a standard gauge electrified railroad in Ethiopia. Arrangements to construct a similar railway between Tanzania's Isaka and Kigali are underway.  Net photo.
Trains at a standard gauge electrified railroad in Ethiopia. Arrangements to construct a similar railway between Tanzania's Isaka and Kigali are underway. Net photo.
Times Reporter