Hi there..have noticed some buses have this black colour box thingy at the driver's cabin that has these 4 words with lights that will blink and a buzz sound will be made.
The 4 words are Speeding, Braking, Acceleration, Swaying.
So opened this thread to keep track of the buses having these black boxes...
Kranji Depot (3 buses)
SMB5Y (KJ 172)
SMB6U (KJ172)
SMB219Y (KJ188)
Woodlands Depot/ Bus park (0 buses)
Ang Mo Kio Depot (0 buses)