Saudi Arabia's Transport General Authority figures, published by Saudi Press Agency on 10 August 2026, describe freight transported in the second quarter. Saudi Arabia Railways carried 3.3 million tonnes on its northern network and 396,000 tonnes on its eastern network. The report also gives 47,000 TEU of container traffic. The reference period is April to June, not August: the publication date tells readers when the figures were released, not when the trains carried the goods.

Converting only the scale, 396,000 tonnes equals 0.396 million tonnes. Adding the two stated network amounts produces 3.696 million tonnes, consistent with the rounded headline of 3.7 million tonnes. Within that calculation the northern network represents about 89.3%: 3.3 / 3.696 × 100. Because the northern figure is rounded, this calculated share is approximate. It is not a precision estimate of each commodity, each train or the national freight market.

The 47,000 TEU observation is a separate capacity-equivalent measure. It cannot be added to the tonnage total, and the release does not establish whether the goods inside those containers are already included in the mass figures. Nor can tonnes divided by TEU reveal a valid average container weight when the numerator may contain bulk cargo and the scopes differ. Preserving the units prevents a seemingly simple calculation from inventing cargo that the underlying statistics do not define.

Bulk and container services can place different demands on a railway. Repeated high-volume shipments may support dedicated trains and predictable loading equipment. Container services need connections with terminals, cargo owners and onward transport, with scheduling that matches the availability of individual boxes. These are general operating distinctions, not a claim about the exact commodities, train lengths or service frequencies in this release. The observed network split alone cannot reveal which operation earns a higher margin.

Rail's economic advantage depends on more than transported mass. Collection and delivery at each end, terminal waiting, train utilisation and reliability influence cost per shipment. A large volume can spread fixed infrastructure costs, but it does not guarantee that every service is well filled or that an additional shipment has low marginal cost. The source supplies neither tonne-kilometres nor journey distances, revenue, operating costs or train utilisation. A national cost saving cannot therefore be calculated from these totals.

For subsequent comparison, quarterly mass should be matched with the same network definitions and the same reporting window; TEU should remain its own series. Port connections may become more valuable if inland schedules and terminal handling are coordinated, while a bottleneck at either end can weaken that benefit. The data establish activity, not future growth or realised emissions savings. A conditional assessment of logistics integration is justified; a numerical forecast of freight demand or a promised unit-cost reduction is not.