What is the correct action to take when merging onto a highway?

When merging onto a highway, the correct action is to yield to traffic already on the highway. This is crucial for ensuring safety and smooth traffic flow. Merging requires you to assess the speed and position of vehicles already in the lane you are entering. By yielding, you allow other drivers the right of way, which helps prevent collisions and allows you to merge more effectively.

Choosing to speed up and merge without looking would be dangerous, as it disregards the need to check your surroundings and gauge the speed of highway traffic. Stopping completely before entering a highway is also not advisable, as it can create disruptions and increase the risk of accidents, particularly if there are vehicles behind you. Using your horn to alert others is not a standard practice for merging, as it can be misinterpreted or create unnecessary noise that adds to the confusion. Thus, yielding to traffic is the safest and most appropriate action when merging onto a highway.