What should you do when merging onto a highway?

Answer: B — Accelerate to match the speed of traffic

When merging onto a highway, it is crucial to accelerate to match the speed of traffic. This strategy helps ensure that you can integrate smoothly and safely into the existing flow of vehicles. Highways typically operate at higher speeds, and aligning your speed with that of other drivers minimizes the risk of accidents and facilitates a more orderly merging process. Maintaining an appropriate speed while merging helps to create a cohesive traffic pattern. If you were to stop or significantly slow down, as suggested in some of the other options, you would create potential hazards not only for yourself but also for the vehicles already on the highway. Checking mirrors is essential for safety, but merging without adjusting speed could lead to dangerous situations. Taking your time to merge slowly might also lead to disruptions in traffic flow, making it challenging for others to adjust. In essence, accelerating to match the speed of traffic is the safest and most effective approach when merging onto a highway, as it enhances both your safety and that of other road users.