A truck traveling in lane 3 of an expressway with three lanes in each direction (no exclusive lanes) wants to overtake the vehicle ahead. Which lane may it use to overtake?
The lane you may use for overtaking is determined relative to your designated lane (Annex 9, Note 3 of the Enforcement Rule), so first find the truck's designated lane. Also check which vehicle types may use the first lane, and the ban on driving on the shoulder (Article 60 of the Road Traffic Act).
Answer: ④
Explanation
On a three-lane expressway, a truck's designated lane is lane 3 (the right lane), and when overtaking it may use lane 2, the lane immediately to the left of its designated lane (Enforcement Rule Annex 9, Note 3). Lane 1 is for passenger cars and light/small/medium buses overtaking, so trucks may not use it. Driving on the shoulder is prohibited except in unavoidable cases (Road Traffic Act Article 60(1)).
Legal basis: 도로교통법 시행규칙 제16조 별표9 비고 3, 도로교통법 제60조