Final answer:
The sign on a transit bus signalling to enter traffic indicates that it is attempting to merge back onto the road, and drivers should allow it to integrate into the flow of traffic safely. This supports public transportation efficiency and overall road safety.
Step-by-step explanation:
When a transit bus is signalling to enter traffic, it means that the bus is trying to merge back into the flow of vehicles on the road after stopping, often at a designated bus stop. Other drivers should be courteous and allow the bus to enter the traffic stream. This is not only a matter of courtesy but also a safety measure to prevent accidents and ensure the smooth flow of traffic. Some regions have specific laws requiring drivers to yield to buses signalling to enter traffic, recognizing the importance of public transportation efficiency.
The presence of a traffic signal at intersections, as mentioned in the provided references, significantly enhances pedestrian safety by regulating vehicle movements and providing clear indications for pedestrians when it is safe to cross the street. Similarly, signals and signs for buses help coordinate the movements of large vehicles with general traffic, thereby contributing to overall transit and pedestrian safety.