mumbai taking a cue from the aviation industrys blackbox technology indian railways have decided to install an audiovisual recording system inside the motorman and guard cabins and cctv cameras on the exterior of suburban trains to aid investigations into the cause of accidents as well as for crew performance assessmentin the 202223 budget the railway ministry has sanctioned around rs 25 crore for installation of the audiovisual technology in all 226 suburban rakes across central railway cr and western railway wrin the mumbai region wr has already installed the technology in 25 of its locomotives we will be able to complete the installation in all 113 rakes by december sumit thakur wr chief public relations officer said his counterpart in the cr shivaji sutar said so far three rakes already have the audiovideo recording system the technology will be installed in the remaining rakes in phases cr has 165 suburban rakesthe cctv cameras will use traction technology to withstand shock and vibrations as trains clock 80100kmph on the suburban section said sources the presence of cameras will deter unauthorised railway employees from travelling in the motorman or guards cabin also the crew will be deterred from using their phone when on duty as all happenings inside the cabin will be recorded said a senior officerthe cctv cameras installed on the front of the train will help ascertain the cause of accidents including those related to trespassing on tracks and help in probes against phatka gangs who target passengers on the footboard of running trains the voice and image recordings will be retained in the system for a specific period of time in case an inquiry is ordered to investigate untoward incidents said sources