What crucial feature limited the true universal standardization of Seatrain Lines' system?

Answer

It relied on existing, variable-sized rail infrastructure

Seatrain Lines achieved a form of intermodal transport by loading entire railroad boxcars onto specialized ships. However, because the cargo unit was the entire railcar, it was tied to the variable dimensions of existing rail infrastructure, preventing the universal standardization achieved later.

What crucial feature limited the true universal standardization of Seatrain Lines' system?

#Videos

History of the Shipping Container - YouTube

inventioncontainershiptransport