Before a junction, a rider needs to think beyond the traffic light. The question is also whether drivers beside and behind can see the motorcycle. Sitting too close behind a car can hide the bike just when others are reading the road.
A clear lane position gives better visibility and more options if the vehicle ahead brakes suddenly. It also helps the rider avoid blind spots where a driver may notice the motorcycle only at the last moment.
SAAQ motorcycle safety material stresses that visibility is an active choice. Riders can improve their chances of being noticed with lights, signals, contrasting gear and a clear position in traffic.
The practical rule is simple: leave space before the junction, signal early and ride or stop where the motorcycle is not hidden behind a larger vehicle. That makes the next movement easier for others to anticipate.