In 2017, the nation had  of railway track, the third longest in Europe after Germany and France. The Polish State Railways (PKP) is the dominant railway operator in the country. In December 2014, Poland began to implement high–speed rail routes connecting major Polish cities, and started passenger service using the New Pendolino train, operating at 200 km/h on the Central Rail Line (CMK). Polish regulations allow trains without ETCS to travel at speeds up to 160 km/h, trains with ETCS1 up to 200 km/h, and trains with ETCS2 at over 200 km/h. Most inter-regional connections rail routes in Poland are operated by PKP Intercity, whilst regional trains are run by a number of private operators, the largest of which is Polregio. The largest passenger train station in terms of the number of travelers is Wrocław Główny.