You are merging onto an interstate using the acceleration lane. What should you be doing along that lane?

Why A is correct

An acceleration lane has exactly one job: to let you reach the merge point already travelling near the speed of the traffic you are joining. Everything dangerous about merging comes from the speed differential — traffic arriving from behind at seventy alongside you entering at forty gives nobody time and nobody an escape route. Use the whole length of the ramp to build speed, signal early, check over your shoulder for the blind spot, then slot into the first genuine gap while maintaining your speed.Stopping at the end of the lane wastes the only resource the ramp provides, leaving you to join from a standstill. If the lane runs out first, slow on the shoulder and wait rather than forcing your way in.

Why the other options are wrong

B. Signal and push into the lane to make a gap appear

Edging into moving traffic to compel a gap is aggressive rather than skilful. It forcesothers to brake hard or swerve, and the driver least able to yield is usually the truck behind you.

C. Stop at the end of it and wait for a gap to open

Stopping where traffic is moving at highway speed is the worst option on the list. You are now asking everyone behind to accommodate a stationary vehicle while surrendering the single advantage the ramp was built to give you.

D. Merge at the speed you arrived with, whatever that is

Merging at ramp speed creates a large differential and a blind-spot conflict simultaneously. Vehicles behind you expected anyone ahead to be accelerating toward the flow, and the closing rate gives them almost no time to react.

On the road

A driver creeps along the ramp at thirty-five, reaches the merge point beside a line of traffic doing seventy, and freezes. The cars behind brake hard and swerve toward the shoulder. The driver who used the full ramp length arrives at the same spot already doing sixty-five and slots straight into a gap.

Similar questions

• Driving the Limit in a Blizzard | CO

  A driver holds exactly the posted 45 mph limit through a heavy snowstorm in which visibility has dropped to half a block. Which statement is correct?

• Below the Interstate Minimum Speed | CO

  A minimum speed is posted on the interstate you have just joined, but a mechanical fault means your car cannot sustain it. What is the right response?

• Overdriving Your Headlights | CO

  You are driving an unlit rural road at night on low beam. What does the term 'overdriving your headlights' mean?

• Double the Speed, Quadruple the Stop | CO

  A driver doubles their speed from 30 mph to 60 mph on the same dry stretch of road. What happens to the distance required to stop?

• Slowing for Junctions and Crossings | CO

  Beyond curves and hills, which additional locations require a driver to reduce speed even where no lower limit is posted?