Ontariohighwaytrafficact.com

Who is allowed to have flashing white lights to the front? Example, construction or event vehicles?

Alternating highbeams on other vehicles prohibited

(2) No person shall use highbeam headlamps that produce alternating flashes of white light on any vehicle other than a vehicle referred to in subsection (1). R.S.O. 1990, c. H.8, s. 169 (2).

Go to subsection (1) to see which vehicles are referenced....

Emergency vehicles

169 (1) Despite section 168, highbeam headlamps that produce alternating flashes of white light may be used by a public utility emergency vehicle while responding to an emergency and by an emergency vehicle as defined in subsection 144 (1). R.S.O. 1990, c. H.8, s. 169 (1).

"Public utility emergency vehicle while responding to an emergency" and "emergency vehicles" is the answer. Go to subsection 144 (1) for the definition of an emergency vehicle...

Traffic control signals and pedestrian control signals

144 (1) ...

“emergency vehicle” means,

(a) a vehicle while used by a person in the lawful performance of his or her duties as a police officer, on which a siren is continuously sounding and from which intermittent flashes of red light or red and blue light are visible in all directions, or

(b) either of the following vehicles, on which a siren is continuously sounding and from which intermittent flashes of red light are visible in all directions:

(i) a fire department vehicle while proceeding to a fire or responding to, but not while returning from, a fire alarm or other emergency call, or

(ii) an ambulance while responding to an emergency call or being used to transport a patient or injured person in an emergency situation; (“véhicule de secours”)