high speed tests using the new pendolino ed250 on the cmk central rail line began in november 2013. on the first day of tests, november 16, the pendolino reached . on 17 november 2013 a new speed record for polish railways was set at km 184.000 of polish line no. 4 when pendolino ed250 reached a speed of , breaking the 19-year record of . on 24 november 2013 the final day of tests on the cmk central rail line the pendolino reached .