Crossrail AG

Updated: August 2026 – Anyone wanting to photograph trans-Alpine freight traffic often heads for the wrong place. The tunnel is the shortest and least accessible part of the journey. Everything you can actually observe happens before and after it – on the approach lines. Crossrail AG is a Swiss freight operator and a good reason to take this part of the axis seriously.

What is Crossrail AG?

Crossrail AG is a freight transport company based in Switzerland. The company name is English and meant descriptively: “cross” for crossing, “rail” for railway. It names a programme – traffic that crosses borders and mountains – but not a region, a specific route, or a concrete network. The AG legal form is the norm among Swiss railway companies.

There’s a warning attached to the name: the word “Crossrail” crops up across Europe in very different contexts, some of them projects with no connection whatsoever to this company. A similar-sounding name is no evidence of a corporate link. In the field, only the train itself – and the markings on the vehicle – reveal what a company actually runs.

Approach lines to the Alpine tunnels: where the traffic really happens

In the public imagination, an Alpine tunnel is the structure. Operationally, it is the short, trouble-free part of the axis. What matters is what lies in front of it: the approach lines, over which trains are brought to the portal from a wide catchment area. They are many times longer than the tunnel, run through populated areas, and share their capacity with passenger trains.

From this follows the basic pattern of Alpine traffic: bundling. North of the Alps, traffic from several countries converges onto a handful of paths; south of them, it fans out again. From Belgium, for example, Lineas feeds trains into this corridor without ever running as far as the tunnel itself. On the approach lines, trains of very many operators therefore run in close succession one after another – for spotters, that is precisely the interesting effect. Nowhere else can you compare different freight operators so well side by side.

At the north end of the Gotthard axis, this shows up most clearly at Basel SBB, where the approach traffic from Germany, France and the North Sea ports converges. South of the massif, Bellinzona plays the same role for traffic heading to Italy. And anyone who wants to see the trains on the ramp rather than at the portal will find the right spot at the Gotthard south ramp at Giornico. Beyond the border, the network belongs to Rete Ferroviaria Italiana (RFI), which is why locomotives are regularly changed at the crossing.

Section of the axis	What happens there operationally	What it means for you as a spotter
Approach line on the flat	Bundling of several originating relations	high train density, many different operators
Ramp up to the portal	Gradient, steady, often slower running	longer visibility, good photo spots from public paths
The tunnel itself	Through-running without a stop	nothing – portal areas are operational railway land
Approach on the far side	Fanning out into destination relations	changing train make-ups, different wagon mixes
Border station at the end of the corridor	Traction and crew change, inspections	plannable dwell times from the platform

The bundling effect also explains why Alpine traffic is so sensitive to engineering works. If a path is lost on an approach line, there is rarely an equivalent alternative – traffic then either diverts over a wide area or shifts to other times of day. For spotters, that can actually be interesting: diversions route trains over lines where they are otherwise never seen. It isn’t reliably plannable, but it explains why unusual vehicles turn up on some days.

Distinct from the concept of an approach line is the mountain line, which overcomes the difference in altitude itself. How a mountain line and a summit tunnel work as two different answers to the same mountain is described in detail in this database under BLS AG.

Identification in the field: step by step

Placement within rail operations

Freight traffic through the Alps is north-south traffic: trains start in the north of Europe and end in the south, or vice versa. The result is high variety in vehicles and wagons, and operations that follow path allocation and load volume rather than a clock-face timetable. There are hardly any fixed times, but recurring patterns exist all the same.

On the vehicle side, powerful electric locomotives dominate the picture, and multi-system machines are increasingly common in cross-border service. The rolling-stock database has entries such as the Re 474 (Vectron CH) and the Re 465. These pages are reference points for design and equipment – which machine a given company actually deploys changes with procurement and hire contracts, and needs checking against the current state.

Other companies operate in the same corridor, including BLS Cargo, Hupac and SBB Cargo International. How to observe freight traffic systematically is described in the article on the freight train radar; the guide to the UIC number on the vehicle explains how the twelve-digit vehicle number is built up.

Choosing a spot on an approach line

Documenting sightings

How to turn this into usable pictures is covered in the article How to take good photos of trains.

Common mix-ups

• Treating the tunnel as an observation spot – the traffic you can actually see is on the approach lines, not at the portal.
• Equating an approach line with a mountain line – one brings traffic up, the other overcomes the difference in altitude itself.
• Reading a shared name as a link – an English company name proves neither origin nor group membership.
• Using the locomotive as proof of origin – it describes one leg of the diagram, not the whole journey of the train.
• Using livery for identification – liveries change, the data panel stays.

Conclusion

Crossrail AG is a Swiss freight operator within trans-Alpine north-south traffic. Its environment is best explained through the approach lines: they determine how much traffic even reaches a tunnel, and they are the place where you can actually observe that traffic. Once you understand that, you’ll look for your photo spots on the ramp in future, rather than at the portal.