Train is the best way for any kind of journey. It is cheap, comfortable and easily available. With the help of a Russian company called NtechLab, Indian Railway has installed around 500 cameras which can track anyone with facial recognition.
Right now, the camera’s are installed on around 30 train stations in Gujrat and Maharashtra including Mumbai. These cameras can easily track 50 people in single frame, even people wearing masks too. They can even give the total head count too. Down the road, these technology will be used to track criminals, missing persons etc.