This analysis, based on Renfe's established timetables and considering routes with fewer stops, highlights an upward trend in travel times, without accounting for the usual delays or incidents in the service.

The increase in travel time on the R4 line, connecting Terrassa with Barcelona, is primarily due to two factors. Firstly, the shortest route in 2000 included 11 stations, whereas it now has 15. One of the new additions is the Terrassa Est station, inaugurated in 2008.

Secondly, Adrià Ramírez, president of the Association for the Promotion of Public Transport (PTP), told ACN that the increase in trains making all stops, without a corresponding increase in network capacity, has led to direct or semi-direct trains requiring more time or being eliminated. This statement is corroborated by Joan Carles Salmerón, director of the Centre for Transport Studies, who highlighted the "weakness of the railway system" due to a lack of investment in Catalan infrastructure. Although investments have begun in the last "three or four years," ongoing works affect track capacity and, consequently, train schedules.

Despite the R4 line showing the most significant time differences overall, Terrassa residents are not the most affected. The time increase in Terrassa is the third lowest on the line, surpassed only by Sant Feliu de Llobregat (2 minutes more) and Sabadell (3 minutes more). The most affected localities are Manresa and Martorell, with increases of 8 and 11 minutes respectively, and especially Vilafranca del Penedès and Sant Vicenç de Calders, where travelers have seen their journeys increase by 17 and 23 minutes, reaching an hour and a half of travel.

This trend extends to other lines in Catalonia. On the R3, the journey between Vic and Barcelona has increased from 71 to 86 minutes since 2000, and users from Ripoll or Puigcerdà have experienced increases of about 20 minutes. The lines of the Terres de l'Ebre and the connection between Barcelona and Girona also show similar increases to those in Terrassa.