a three-bed cabin Quadruple : a four-bed cabin All cabins are equipped with shower and wash basin with private toilet. High cab there is a reception with bar service. Excelsior single and double cabins are available from all sales channels, while the triple and quadruple only at the ticket and authorized travel agencies. When travelling in these coaches you must have a personal identification document. Netherlands Intercity trains are very common in the Netherlands, but may differ from each other. While some intercity trains call only at larger stations, some others may also call at smaller stations or at all intermediate stations along a short stretch of its route. Hence, some stations may be served by one intercity train while another may pass it. For example, the Intercity trains between Arnhem Central station and Utrecht Central station alternately serve Driebergen-Zeist or Veenendaal-De Klomp (and both when the frequency is lowered from 4tph to 2tph in the evening). Often, intercity trains run as local trains along the very end of its route. For example, the Nijmegen to Den Helder intercity runs as regular intercity until Alkmaar, serving larger stations only, but running as local train between Alkmaar and Den Helder, serving all intermediate stations. The average distance between station is shorter than most IC trains in most other countries, but frequencies are higher. All lines are served at least with 2tph, but many busy stretches are served have 4tph. From Utrecht Central there are even two different services to Amsterdam, one that serves the central station and two others and another that serves the south station and the airport. From December 2017 the frequency between Amsterdam, Utrecht and Eindhoven will be further increased to 6tph. Rolling stock used mostly for intercity services in the Netherlands is VIRM. DD-AR trains have been converted to be used as New Intercity Double deckers and have been introduced to parts of the intercity network. Also, older ICM (formerly known as Koploper) EMUs are frequently seen on intercity routes. ICRm coaches, pulled by a TRAXX locomotive, can be seen on international stretches and the Intercity Direct. Poland In Poland IC trains operated by PKP Intercity S.A. up to 2009 served the following routes: Warsaw–Katowice /Kraków with speed up to 200 km/h. Warsaw–Katowice–Bielsko-Biała with speed up to 160 km/h Warsaw–Katowice–Gliwice with speed up to 160 km/h Warsaw–Poznań–Wrocław with speed up to 160 km/h Warsaw–Katowice–Opole–Wrocław with speed up