Complex sentence: On 26 March 2011 the new European Rail Traffic Management System (ERTMS) signalling system went into operational use across the Cambrian Line controlled from Machynlleth, two days of driver familiarisation followed, with passenger operation commencing on the morning of 28 March 2011.
Split into simpler sentences: On 26 March 2011, the new European Rail Traffic Management System (ERTMS) signalling system went into operational use across the Cambrian Line controlled from Machynlleth. Two days of driver familiarisation followed, with passenger operation commencing on the morning of 28 March 2011.