What is an important action to take before merging into traffic?

Assessing the speed of other vehicles is crucial before merging into traffic. This action allows you to gauge how fast other vehicles are approaching and whether you can safely merge without causing a disruption. By understanding the speed of surrounding traffic, you can make informed decisions on when and how to merge, ensuring that you fit into the flow of traffic smoothly and safely. This awareness contributes to overall road safety and helps in avoiding potential collisions.

Turning on hazard lights may confuse other drivers, as they typically signal a temporary stop or a breakdown. Checking only your left mirror does not provide a complete view of your surroundings. It's essential to check all mirrors and blind spots to ensure you have a clear understanding of the traffic situation on both sides and behind your vehicle. Accelerating quickly is not advisable as it can increase the risk of losing control or misjudging the gap you need to merge effectively.