About this map

This map shows the last known position of every train that Renfe publishes as open data, with its delay, its next stop and, above all, how old each piece of data is. It also keeps a public record of what the official sources said, so that journalists, researchers and anyone else can analyse it later.

It is not a railway safety system. Traffic safety depends on signalling, on the train's protection systems (such as LZB, ERTMS or ASFA) and on Adif's control centres. Nothing on this website interacts with them or can warn a driver or a control centre.

• The data arrives with a delay of seconds to minutes and sometimes contains errors.
• Between one update and the next, a high-speed train can travel more than a kilometre.
• Do not use this website to make decisions that affect anyone's safety.
• In an emergency, call 112.

Today, Renfe (high-speed, long- and medium-distance, Cercanías and Rodalies), FGC (all its lines) and Metro Bilbao publish the position of their trains as open data. FGC does not publish the minutes of delay, only whether the train is on time. That is why this map does not show every train running on a track:

• Iryo and Ouigo do not publish real-time positions.
• Adif, which manages the infrastructure and knows every movement, does not publish them as open data.
• Freight trains and maintenance vehicles do not appear.
• Regional operators (FGC, Euskotren, FGV, SFM…) are not yet integrated.

A map with only some of the trains can give a false impression of a clear line. We say so here and on the map itself so that nobody reads it that way.

• We show the GPS position that Renfe publishes (updated every 15–20 seconds) and the age of each position. A train with no data in the last 3 minutes is drawn faded.
• We do not invent positions: we do not extrapolate where a train “should” be between two updates.
• We correct and flag known defects in the sources: the long-distance feed publishes its time one hour out; some Cercanías delays arrive with the wrong day; we discard impossible delays and positions outside Spain.
• Speed and direction of travel are estimated from two consecutive positions, and are labelled as such. If the jump between two positions is physically impossible, it is marked as doubtful.
• We always say whether a source has stopped updating, and since when.

That Adif, Iryo and Ouigo publish the position of their trains in real time as open data, as Renfe already does, under the European multimodal travel information framework (Commission Delegated Regulation (EU) 2017/1926).

Every version brings changes you can see: we describe them in What's new, also available as an RSS feed.

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