You must obey traffic signs and signals, and those meant for cyclists take priority.
The Safe Cycling Guide (PDF, 1.2 Mo) details the signals intended for cyclists. Here are a few examples taken from the guide:
Indicates that children under 12 must be accompanied by an adult on a road where the speed limit is over 50 km/h
Indicates that you must get off your bicycle
Indicates a mandatory route for cyclists and pedestrians
Indicates that cyclists may ride against the flow of traffic on a one-way street
Indicates that cyclists must use the pedestrian traffic light to cross the street
Important! Where this sign is not posted, cyclists facing a red light and an activated pedestrian crossing light are allowed to proceed in the authorized direction. In such cases, cyclists must stop, give the right of way to pedestrians, and ride at a safe and reasonable speed.
Traffic lights for cyclists are placed alongside bikeways
Symbol painted on the roadway to indicate that a lane is reserved for cyclists
You must ride with the flow of traffic, except when riding against traffic is authorized or in case of necessity.
Road signs and pavement markings indicate that these lanes are reserved for cyclists.
These roadways do not have a corridor reserved for cyclists.
Shared roadways are indicated by road signs, and a pictogram representing a bicycle is painted on the pavement.
They are generally located away from automobile traffic or separated from traffic by a physical barrier.
Check with your municipality to know what safety rules apply.
Last update: February 3, 2021