lucknow covid19 protocol has increased railways dependence on technology for routine activities like track maintenance to monitor impact of heat on rail tracks which is a routine maintenance exercise during summers lucknow division of northern railways nr is using gpsbased advanced technologybesides transmatic robotic system is being used for overhauling of level crossings the technology is being used at 84 level crossings drm nr lucknow sanjay tripathi said it is a machine which maintains heavy track structure by means of computer controlled mechanics to correct the parameters it cuts down the requirement of labourers for maintenance workultrasonic flaw detection usfd machine which can detect even the slightest flaw in rails and welds which may not be visible with the naked eye is also being used along with track recording car runs for maintenance of tracks usfd injects ultra sonic waves into the rails using probes long thin instruments to detect flaws the track recording cars are used to carry the machinesthe division had recently used another technology plasser quickly relaying system pqrs to replace old tracks in unnaomagarwara stretch which is part of lucknowkanpur section one of the busiest sections of nrpqrs has prelaid panels ready with sleepers and fittings which are placed at the intended site removing old tracks using machines