Passenger traffic on the GCR was never heavy because it was the last main line to be built and had difficulty competing against longer-established rivals (especially the Midland Railway from its terminal at St Pancras) for the lucrative intercity passenger business. Low passenger traffic meant Marylebone was the quietest and most pleasant of London's termini. The GCR was unhappy about having to use part of the Metropolitan Railway's route to reach Marylebone, and opened a new line to High Wycombe on 2 April 1906. The additional suburban services generated traffic for the station, which had previously been so empty on occasion that the staff outnumbered passengers. While passenger traffic remained relatively sparse, the line was heavily used for freight, especially coal; in 1914, 67% of traffic was goods-related. Trains ran from the north and East Midlands to the freight depot adjoining the station, which was marginally the largest in London.