# Double Stack Rail Freight Systems

*Last updated: 2026-06-23*

> Unlike conventional single-layer intermodal service, double stack rail freight systems load two ISO containers – typically 40-foot high-cube units – one on top of the other on purpose-built well cars, whose lowered centre sections keep the combined height within permissible limits.

Unlike conventional single-layer intermodal service, double stack rail freight systems load two ISO containers – typically 40-foot high-cube units – one on top of the other on purpose-built well cars, whose lowered centre sections keep the combined height within permissible limits. The method roughly doubles container capacity per train and substantially reduces cost per unit on high-volume long-haul corridors. North America pioneered and continues to rely on double stack as the backbone of its intermodal rail network; in Europe and parts of Asia, lower tunnel clearances, overhead electrification infrastructure, and axle-load restrictions limit adoption significantly. Before a route can be approved for double-stack operations, railways and intermodal operators must conduct a loading gauge clearance audit to confirm that the full corridor accommodates the required height.

**Source:** [https://en.wikipedia.org/wiki/Double-stack_rail_transport](https://en.wikipedia.org/wiki/Double-stack_rail_transport)

## Quick Facts

| Property | Value |
|---|---|
| Term | Double Stack Rail Freight Systems |
| Language | EN |
| Word count | 125 |
| Last updated | 2026-06-23 |
| Source | https://en.wikipedia.org/wiki/Double-stack_rail_transport |

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