they should start installing CCTVs and smoke detector as near to
the buses as possible, since they are all surrounded by grass as a
precaution and to catch the culprit if possible.
For indoor bus depots, sprinklers can be installed. However, it is
not feasible to install smoke detectors as the exhaust smoke would
also trigger the fire alarm.
Smoke detectors are also not feasible for outdoor carparks.
CCTV may do but if it really were an arson and the culprit's
face was recorded.
Reply to another post: The KMB fire broke out at bus park near
Tin Tsz Estate on 31/3/2008.