Reading a Railway Line Map: Kursbuchstrecke, KBS and Operating Points

Updated: August 2026 – If you can read a railway line map, you see more than just lines – you see how operations actually work: where trains branch off, where they’re overtaken, and where several lines bundle together. This guide explains the two numbering systems – Kursbuchstrecke and VzG line number – along with the most important operating points, and shows how to use them to derive photo locations that appear on no spot list.

What is a Kursbuchstrecke – and what is a line number?

A Kursbuchstrecke (KBS) is the reference number of a timetable table: it groups together which trains appear in a shared table. A VzG line number, by contrast, is a four-digit code denoting a structurally defined section of infrastructure – regardless of which routes run there. In short: the KBS describes the traffic, the line number describes the asset.

This distinction is why the same railway line carries different numbers in two different sources – and why many connections are better known in everyday use by a brand name than by their number anyway, such as the Hellertalbahn. A KBS can run across several VzG lines, and several KBS can sit on one VzG line. For timetable research you use the KBS, for understanding how operations are organised you use the line number. Both systems are German peculiarities – across the border, infrastructure managers run their own numbering schemes, in Norway for instance Bane NOR. Combine both and you can predict from a map, fairly precisely, where it’s worth stopping – similarly systematic to how the guide to the trainspotter map with hotspots and planning describes trip preparation.

Operating points and their abbreviations

Operating points are the structural markers of a line. Their abbreviation reveals what’s operationally possible there – and therefore, indirectly, whether it’s interesting for spotters.

Code	Meaning	What happens there operationally	Relevance for spotters
Bf	Station (Bahnhof)	Stopping, overtaking, crossing, regulating train sequence	High: lots of traffic, often legal spots at the platform
Hp	Halt (Haltepunkt)	Boarding and alighting only, no points	Medium: predictable stops, but little operational variety
Abzw	Junction (Abzweigstelle)	Switching to another line without stopping	Very high: vehicles from several directions
Üst	Crossover point (Überleitstelle)	Track change on the open line	High during engineering works and single-track operation
Bk	Block post (Blockstelle)	Subdivides train sequence, no track change	Low, but a sign of dense train sequence
Anst / Awanst	Siding connection	Links up private sidings	High for freight traffic and rare workings

The letter codes for individual operating points – FF for Frankfurt (Main) Hbf or KK for Köln Hbf, for example – come from the operational register of operating points. The first letter follows a rough regional logic. These codes are standard in diversion notices, timetable extracts and forum posts; if you can read them, you understand messages without any translation work. Something similar applies to train numbers, whose system the article decoding train numbers for ICE, IC, RE and RB breaks down.

How to find good locations from the map

The practical benefit of line knowledge is that you recognise interesting points before you set off. Three patterns hold up almost every time.

Pattern 1: Splits

Wherever two lines split apart or merge, traffic concentrates. You see more different vehicles per hour than on a single branch, and the vehicles are often moving more slowly – good for frame-filling shots. Look nearby for a road overbridge, a public path or a platform with a view of the split.

Pattern 2: Parallel sections

Where several lines run side by side – long-distance and local tracks, say, or a freight bypass next to the main line – you get images with depth and the chance of meetings. You can spot such sections on maps by several routes running close together over a longer distance.

Pattern 3: Road crossings

Road overbridges are the most common source of legal elevated viewpoints. You find them on the map by following the line and checking every road crossing. Whether a location is actually any good is only decided on site, though – noise barriers, fences and vegetation are invisible on maps. How you then assess locations photographically is covered in the railway photography guide with tips and locations.

Which type of map suits your goal?

Bringing maps and practice together

A map is a model, not reality. Three checks are essential before you build a trip on one.

Check currency. Engineering works, line closures and rebuilds can change operations for months at a time. A map from three years ago may show a line that no longer exists in that form. How much such rebuilds can shape operations is shown, for example, by the guide to the Eifel line Cologne–Trier.

Check the traffic. A structurally interesting line with no traffic is a poor spot. Freight in particular often doesn’t appear in the timetable book at all – here the approach from the guide on how to track freight trains live helps you get a sense of how much traffic there actually is.

Check access. The most important step. A point you can only reach across railway premises doesn’t exist for you. There’s almost always a legal alternative nearby – if necessary with a different angle.

Line kilometres, directions and other map details

Besides numbers and operating points, good line diagrams contain further information that turns out to be surprisingly useful in practice.

Line kilometrage. Every line has its own kilometrage with a defined zero point. References like “at km 34.7” turn up constantly in construction and disruption notices, and for planning firms such as IGEBA Ingenieurgesellschaft Bahn, the kilometrage is effectively the address within the network. Knowing where the kilometrage starts and which direction it counts in lets you place such notices spatially instead of skimming past them. Note: the kilometrage follows the line, not the direction of travel of a particular train.

Number of tracks and electrification. Whether a section is single, double or multi-track, and whether it runs under wire, determines which vehicles can operate there at all. A non-electrified section means diesel operation – and often a noticeably different vehicle picture from the neighbouring line.

Line category and speed. The permitted speed lets you estimate how fast vehicles will pass your location. That’s directly relevant to your choice of shutter speed: a section rated for 160 km/h calls for a completely different setting than an approach at 40 km/h.

Operating regime. Some sections are worked in a simplified regime, others at high density with short block spacing. Block posts on the map are a good indicator: where there are many of them, the train sequence is dense – a practical hint that waiting will pay off.

Siding connections and station parts. Anst and Awanst point to private siding connections. They’re the reason why freight trains regularly stop or shunt at seemingly unremarkable points – and are therefore often the most interesting piece of information on a map if you’re interested in freight traffic.

From map to trip

Once the analysis is done, it becomes a plan. A sensible approach is to take the least certain point first: visit the location you’re least sure will work first – that leaves time for alternatives.

• Two to three locations per day, not five. Travel times are systematically underestimated.
• Build in known fixed points. A reliable location as a backup takes the pressure off the experiment.
• Note train numbers, not just vehicle types. That lets you reconstruct afterwards what you saw – the guide to tracking DB train numbers explains the system behind them.
• Check special workings in advance. Special trains often run over lines that see little use day to day; how to find them is described in the guide to special trains and special workings.
• Document your results. A location you’ve assessed once stays with you – memory alone isn’t enough after three months.

What to watch out for

• Don’t confuse KBS and line number. Ask about the wrong number in a forum and you’ll get answers about a completely different line.
• Avoid undated maps. A map with no visible currency is worthless for questions about engineering works and diversions.
• Don’t over-interpret operating-point types. An Abzw is an exciting point, but without traffic it’s just a fence with a set of points.
• Never assume accessibility. What looks like a farm track on the map can be private land or an operational path.
• Never on or beside the tracks. This point is deliberately repeated here: no location justifies stepping onto track areas.
• Don’t rely on maps alone. A look at real sightings on a section tells you more about your hit rate than any line colour. An overview of the best platform locations is provided by the article on the best stations for trainspotting in Germany.

Conclusion

Reading line maps is one of the few skills in spotting that pays off immediately and only gets more valuable over time. Once you keep KBS and line number apart and recognise the main operating points, you no longer read a map as a diagram of lines, but as a description of operations. That lets you find your own locations – and understand diversion notices that stay cryptic to everyone else.