Regulation 4

5 kilometres per hour if within 10 metres from an aircraft parked at an aircraft stand;

30 kilometres per hour if on any roadway in the vicinity of an aircraft stand; and

50 kilometres per hour if on any roadway situated away from the vicinity of an aircraft stand.

any fire-fighting vehicle being used to fight fire, preserve life or property, give aid or rescue persons who are in danger or involved in an accident or any other emergency;

any ambulance being used to aid or rescue persons who are in danger or involved in an accident or any other emergency;

any Government-owned vehicle being used by the Singapore Armed Forces, the Singapore Police Force or the Singapore Civil Defence Force to execute, facilitate or aid in any emergency response or rescue operation;

any vehicle that is owned by the Authority or the airport licensee and being used to execute, facilitate or aid in any emergency response or rescue operation.