Final answer:
To safely merge onto a freeway, look over your left shoulder and use both rearview and side mirrors to find a gap, ensuring you check your blind spot.
Step-by-step explanation:
When merging into the acceleration lane of the freeway, you should look over your left shoulder and use your mirrors to look for a gap in the traffic. This method involves checking the rearview mirror to see the traffic behind you, the side mirror to gauge the position of vehicles in the lane next to you, and glancing over your left shoulder—also known as checking your blind spot—to ensure there are no vehicles in the space where you plan to merge.
It is important to perform these steps in a swift and efficient manner to safely merge into freeway traffic. Remember, never rely on your mirrors alone as they may not provide a full view of potential hazards.