The boundary between the roadway and the shoulder.
The boundary between the acceleration lane and the main traffic area.✓Correct answer
The boundary between the braking lane and the main traffic area lane.
Explanation
The broad broken segment marks the boundary where an auxiliary acceleration lane merges into the through carriageway, allowing vehicles to cross while joining the main flow. The chevron-filled gore and joining geometry show an entry rather than an exit, while a shoulder boundary lies at the roadway edge.
