Luxembourgeoise de Chemins de Fer (CFL)

Updated: August 2026 – Luxembourg has one of the smallest rail networks in Europe and, at the same time, one of the most technically demanding. CFL borders three countries that run on three different voltages, and has to run through-services into all three. On top of that comes a quirk found nowhere else: since 2020 local transport across the whole country has cost nothing.

Capture a whole network in one day

Luxembourg is small enough to document fully – log every series with number and location.

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A railway that owns the track and the train at once

CFL was founded in 1946 by state treaty, with Belgium and France taking part alongside Luxembourg – a construction dating from the post-war years, reflecting the neighbours’ influence on a network between them. Today the company sits entirely with the Luxembourg state.

Unlike in most European countries, CFL remains integrated to this day: it runs passenger trains and operates the infrastructure at the same time. That’s possible because European law treats small networks differently from large ones. Only freight was spun off, set up as an independent company in 2006.

Four voltages at three borders

Luxembourg sits at one of the densest system boundaries in Europe. Within a few kilometres, four different traction current systems meet.

CFL’s answer to this problem is the 4000 series of locomotives, which can handle all four systems. What would be a specialist vehicle for rare duties elsewhere is standard equipment here. Anyone interested in multi-system technology will find more of it in Luxembourg than on any larger network.

How to get the most out of a day in Luxembourg

Freight belongs to somebody else

Luxembourg was a steel location for decades, and freight traffic still bears the traces today. Only the state railway doesn’t run it. CFL cargo was spun off in 2006 and set up jointly with the steel industry. The company has its own national subsidiaries and is active well beyond Luxembourg as a result.

For you at the lineside that means: a freight train carrying the CFL logo is almost never a train of the passenger operator. That very distinction between brand, keeper and leading company is described in the guide Who’s actually running the train? – and it’s especially easy to miss in Luxembourg, because both firms carry the same abbreviation.

That’s visible far beyond the country’s borders too. In Germany, CFL Cargo Deutschland runs with its own licence, in Scandinavia CFL Cargo Danmark. Anyone photographing a locomotive with the Luxembourg logo in northern Germany hasn’t caught the state railway.

Keep brand and operator cleanly apart

With Traintrack you record what was actually on the train – not just what you guessed.

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What free local transport means in practice

Since 2020, second-class travel across the whole country has cost nothing. For spotters that’s more than a cost saving: it changes how you plan a tour. You don’t have to fix a route in advance, budget for a return ticket, or weigh a detour against the fare. If an interesting train is departing from the main station, you just get on.

There are two limits. First class remains chargeable, and as soon as you cross the national border you need a ticket for the foreign section. So if you want to follow a German or French regional train to its first stop beyond the border, it’s worth checking that in advance.

The arrangement is visible at the station itself too. Machines for domestic travel are largely absent, there are no barriers, and platform access is straightforward. That openness has become rare within Western Europe – in many neighbouring countries you can no longer reach the platform without a ticket at all. How to use the twelve-digit vehicle number to keep sightings like this usable long-term is explained in the guide to the UIC number.

CFL, CFL cargo, or a neighbouring railway?

Freight traffic towards Belgium, incidentally, runs on axes that continue further north at Montzen – an area where the same multi-system questions come up as in Luxembourg itself.

Verdict

CFL is a special case in Europe: a tiny network that still has to reflect the full technical complexity of a four-system junction. Anyone wanting to understand why multi-system locomotives get built can see it here in a very small space.

There’s a practical bonus too: a country where local transport costs nothing is the cheapest spotting destination in Western Europe. How to plan such tours affordably in general is covered in the article on budget spotting tours.

Capture four rail systems in one day

Series, numbers and locations in one app – from the Luxembourg multiple unit to the four-voltage locomotive.

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