Right of way

Merging onto a freeway from an on ramp

You are on the acceleration lane of an on ramp and car B is in the right hand lane of the freeway. Who yields?

Merging onto a freeway from an on rampYouB
Merging onto a freeway from an on rampYouB

You are on the acceleration lane of an on ramp and car B is in the right hand lane of the freeway. Who yields?

Explanation

Freeway merge: the rule

The rule

Traffic entering a freeway yields to traffic already on it, and uses the acceleration lane to reach traffic speed before merging.

The reasoning

The acceleration lane exists so you can arrive at the same speed as the traffic you are joining. Merging slowly forces everyone behind to brake, which is how ramp collisions start.

The usual mistake

Stopping at the end of the ramp. Unless traffic is genuinely at a standstill, stopping there leaves you trying to join fast traffic from zero, which is far more dangerous than merging.