Singapore legislation
Regulation 29A
of Road Traffic (Motor Vehicles, Construction and Use) Rules
Regulation 29A
Hazard warning signal devices
Subregulation 1
Every motor vehicle other than a land implement, a motor cycle, whether with or without a side-car attached, a tractor or a works vehicle, registered on or after 1st September 1993 shall be equipped with a hazard warning signal device.
Subregulation 2
Every hazard warning signal device shall meet the following requirements:
it shall be operated by a single switch;
it shall be capable of causing every of the direction indicators of a vehicle or combination of vehicles with which it is equipped to flash in sequence;
it shall be provided with a closed-circuit tell-tale in the form of a flashing light which may operate in conjunction with any direction indicator tell-tale; and (d)it shall be capable of functioning even when the switch which controls the starting and stopping of the engine of the vehicle with which it is equipped is in a position which makes it impossible to start the engine.