new delhi the third line between aligarh and ghaziabad was finally commissioned on tuesday morning paving way for a smoother train journey in the extended ncr region railways officials say this will cut down waiting time for trains crossing ghaziabad station in the first phase the entry of third line to ghaziabad was introduced which facilitated entry of one train at a time from aligarh to ghaziabad with the increase in traffic on third line the signalling and interlocking was further modified so that simultaneously two trains can enter in ghaziabad yard from aligarh side ghaziabad yard has now been provided with route relay interlocking rri with a capacity to handle 621 routes the second modification in the yard involved changes in 87 routes out of total 621 routes necessitating an addition of about 2000 wires normally such a massive change in signalling and interlocking requires noninterlocking of a yard for many days resulting in cancellation and diversion and slowing down of trains through the yard however northern railway planned to introduce the changes in the interlocking within one mega block of six hours combined with three minor blocks of two to three hours with least interruption to traffic said a spokesperson the wiring of new relays being introduced was carried out in advance prior to blocking of traffic the signalling routes with minimal changes were taken up first and the changes introduced in traffic block of two hours taken on the night of 14th and15th june 2012 the signalling system was restored thereafter prior to taking of activities in mega block of 6 hours the traffic on the new line ie 3rd line was restricted and outdoor changes in track and signalling as well as wiring changes limited to 3rd line working were carried out the major changes in the wiring in rri and subsequent testing of interlocking was carried out in the six hours block in the night of 16th and 17th june 2012 after which main line movement was restored the official added