1 rail car = 3 to 4 truckloads.
One rail car can hold up to 220,000 lbs of product, which typically equals 3 to 4 truckloads. This rule of thumb depends on the type of product being hauled, but it works for the vast majority.
Illustration: Barge vs. Rail Cars vs. Trucks
“Equivalent Units”, image courtesy of Marquette Transportation Company Source: CSX