All the unmanned level crossings were eliminated by January 2019, and manned level crossings are being progressively replaced by overbridges and underbridges. Other safety projects include the extension of an automated fire alarm system, first introduced on Rajdhani Express trains in 2013, to all air-conditioned coaches; and 6,095 GPS-enabled Fog Pilot Assistance System railway signalling devices (replacing the practice of placing firecrackers on tracks to alert train drivers) installed in 2017 in four zones: Northern, North Central, North Eastern and North Western; and replacing ICF coaches with LHB coaches.