What type of vehicle has priority when merging onto a highway?

Vehicles already on the highway have priority when merging onto a highway because they are considered to be in a more established position on the roadway. This rule is designed to maintain a safe flow of traffic and prevent accidents that could occur if merging vehicles do not yield to those already traveling at speed on the highway. The merging vehicle must adjust its speed and find a safe gap in the traffic to enter the highway without disrupting the established flow. This system prioritizes the safety of all vehicles on the road and emphasizes the importance of responsible merging practices to ensure a smooth transition onto high-speed roadways.