What should you always ensure before merging onto a highway?

Before merging onto a highway, it's essential to perform several critical safety checks and actions, making the correct choice "All of the above."

Using your turn signal communicates your intent to other drivers, allowing them to anticipate your movements and adjust their speed or position accordingly. This is vital for maintaining safety and preventing accidents during the merging process.

Checking your blind spots ensures that you're aware of any vehicles that may be alongside you, which might not be visible in your mirrors. This step is crucial because it helps you avoid collisions with vehicles already on the highway as you merge.

Matching the speed of traffic is another key component. By adjusting your speed to align with the flow of traffic on the highway, you reduce the risk of creating dangerous situations, such as sudden stops or the need for other drivers to brake unexpectedly.

By completing all these actions, you enhance your safety and the safety of others as you merge onto the highway, making "All of the above" the optimal choice.