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In page Transport in Spain:

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On the line from Madrid to Seville, the service guarantees arrival within five minutes of the advertised time, and offers a full refund if the train is delayed further, although only 0.16% of trains have been so. In this regard, the punctuality of the AVE is exceptional compared to other non-long-distance Renfe services. On other AVE lines, this punctuality promise is more lax (15 minutes on the Barcelona line). A possible reason for this is that AVE services slow down to 200 km/h for the Sierra Morena section of the journey because of the tight curves and 250 km/h for the Córdoba-Seville section, possibly on account of medium-speed services running on the line, meaning that they have an easy means of recovering lost time if held up earlier in the journey.[citation needed]