Who has the right of way when merging onto a highway?

Traffic already on the highway. The merging driver must yield and find a safe gap — legally and practically. That said, courteous highway drivers move left or adjust speed to create room, and in heavy traffic a zipper-style alternate works best for both parties.

What should I do if there's no gap at the end of the ramp?

Keep matching speed along the merge lane as long as pavement remains — gaps open as drivers react to your signal. If the lane truly runs out, slow smoothly (don't slam) and merge behind the last vehicle. Never swerve onto the hard shoulder to force your way in, and never reverse on a ramp.

Is it OK to stop at the end of an on-ramp?

Only when highway traffic is at a standstill (rush-hour metering) — then it's unavoidable. In flowing traffic, stopping at the merge point is dangerous: you now have to reach highway speed from zero in a car-length of space. The entire point of the ramp is to avoid that.

What is a zipper merge and when should I use it?

At a lane closure or drop, drivers use BOTH lanes up to the merge point, then alternate one-for-one like zipper teeth. Research and traffic authorities consistently show it reduces queue length and total delay versus merging early — the 'polite' early merge actually makes traffic worse. Merge late, alternate, don't block either lane.

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How to Merge Onto a Highway

About 5 minutesEasy7 steps

Highway merging frightens new drivers because it happens fast — but the physics are simple: match the speed of traffic and a gap becomes easy to slide into. Most merge problems come from one mistake: entering the highway too slowly.

Traffic already on the highway has the right of way — merging vehicles must yield. Never stop at the end of an on-ramp unless traffic is genuinely at a standstill, and never back up on a ramp or shoulder. If you miss your gap, continue along the shoulder of the merge lane only if it's designated; otherwise slow smoothly and merge behind.