How should you react if you notice a large vehicle approaching while waiting to enter a main road?

Waiting for a large vehicle to approach while preparing to enter a main road requires caution. The best response is to prepare to stop and assess the situation. Large vehicles, such as trucks and buses, have different stopping distances and may not be able to slow down quickly. By stopping and observing, you can better gauge the speed and distance of the approaching vehicle, ensuring it's safe to merge onto the main road. This approach prioritizes your safety and helps prevent potential accidents caused by misjudging the large vehicle's speed or distance.