in addition to the central rail line from warsaw to kraków and katowice, and from warsaw to wrocław, the pendolinos also operate on the 350 km (221 miles) route from warsaw to gdańsk and gdynia on the baltic sea. in 2011-2015 the warsaw-gdańsk-gdynia route underwent a major upgrading costing $3 billion, partly funded by the european investment bank, including track replacement, realignment of curves and relocation of sections of track to allow speeds up to , and modernization of stations. installation of european train control system level 2 was under way in 2016. when pendolino services started on 14 december 2014 the previous warsaw–gdańsk rail travel time of 4-1/2 to 6 hours was reduced to 2 hours 58 minutes by pendolino, and reduced further to 2 hours 39 minutes in december 2015.