What does this sign mean? What does this sign mean?

  • A. A bypass joins a dual carriageway

  • B. A feeder lane joins an existing lane

  • C. Two lanes merge into one

  • D. A side road joins a one-way street

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    The correct answer is B
     
    Correct. These types of lanes are common in situations where vehicles need to get up-to-speed before joining the lane, e.g. on a motorway. In this case, merge like a zip when traffic is heavy (alternate vehicles take turns to go). When a feeder lane joins an existing lane, it's important to indicate.