Singapore's sole train operator SMRT announced today that two of their stations are testing a new human traffic light system.
The colour-code system helps you see if the station you're entering is 'Not Crowded', 'Slightly Crowded', 'Crowded' or is experiencing a 'Service Delay/Disruption', and hopes to achieve "better journey planning" for passengers, who can now determine platform conditions before they 'tap in'.