I don’t think cargo trains ever go “fast”. But it is slower than normal in the US anyways. I think in US max speed for cargo is like 50 mph / ~75 kph, and this train is going along at 46 kph assuming constant motion. In reality, it’s fast in some segments, dramatically slower in older segments.
According to Wikipedia, it’s an old line that has speed limitations in some areas of 20 kph. Addressing these limitations is a substantial part of the rehabilitation project, aiming to get the speed from 20 kph up to 70 kph.
“the rehabilitation is reportedly expected to result in a speed increase for trains using the railway, from 20 kilometres per hour (12 mph) to 70 km/h (43 mph) for cargo trains, and of up to 80 km/h (50 mph) for passenger trains”
Freight travels at many different speeds. There are many tracks in the US that are speed limited to 30mph or less because they have not maintained the tracks to higher standard, even though there are other freight tracks where trains move at 60+mph.
According to Wikipedia, it’s an old line that has speed limitations in some areas of 20 kph. Addressing these limitations is a substantial part of the rehabilitation project, aiming to get the speed from 20 kph up to 70 kph.
https://en.m.wikipedia.org/wiki/Interoceanic_Corridor_of_the...
“the rehabilitation is reportedly expected to result in a speed increase for trains using the railway, from 20 kilometres per hour (12 mph) to 70 km/h (43 mph) for cargo trains, and of up to 80 km/h (50 mph) for passenger trains”