二郎山隧道

二郎山隧道為全天通行的交通設施，無需預約或購票。請注意：隧道內嚴禁停車、減速或拍照，請按限速規定（通常為80公里/小時）安全駕駛並開啟車燈；如需打卡或觀景，請在隧道兩端的指定停車區安全停留，切勿佔用行車道；山區天氣多變，冬季隧道口路段易結冰，務必提前檢查車況與輪胎，並關注即時路況信息。

Erlangshan Tunnel is a 24-hour traffic facility that requires no reservation or ticket purchase. Please note: stopping, slowing down, or taking photos inside the tunnel is strictly prohibited—drive safely according to the speed limit (usually 80 km/h) with headlights on; if you wish to take photos or enjoy the view, safely stop only at ​designated parking areas at either end of the tunnel, never occupying traffic lanes; mountain weather is changeable, and the tunnel entrance area is prone to icing in winter—be sure to check your vehicle and tires in advance and pay attention to real-time road condition information.

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二郎山隧道位於四川省雅安市天全縣與甘孜州瀘定縣交界處，是G4218雅康高速公路的控制性工程，全長13.4公里，海拔約2200米，是世界上海拔最高、長度最長的高原特長公路隧道。該隧道穿越11條斷裂帶，攻克了高壓湧水、岩爆等世界級難題，將原來翻越二郎山埡口的2小時危險山路縮短為15分鐘的安全通行，徹底解決了冬季冰雪封路問題。隧道東起天全縣喇叭河鎮，西至瀘定縣瀘橋鎮，作為川藏線的「咽喉工程」，它不僅是一項震撼的超級工程，也是串聯成都平原與甘孜高原的經濟文化紐帶，其兩端的觀景台已成為自駕遊客的熱門打卡點。

The Erlangshan Tunnel is located at the border of Tianquan County in Ya'an City and Luding County in Ganzi Prefecture, Sichuan Province. As a critical project of the G4218 Ya'an-Kangding Expressway, it spans 13.4 kilometers at an altitude of approximately 2,200 meters, making it the highest-altitude and longest extra-long highway tunnel on a plateau in the world. The tunnel passes through 11 fault zones, overcoming world-class challenges such as high-pressure water inflow and rockbursts. It reduces the original dangerous 2-hour mountain crossing over the Erlangshan Pass to a safe 15-minute drive, completely eliminating the problem of road closures due to ice and snow in winter. Starting from Labahe Town in Tianquan County in the east and ending at Luqiao Town in Luding County in the west, the tunnel serves as a "strategic throat project" on the Sichuan-Tibet route. It is not only an awe-inspiring mega-engineering feat but also an economic and cultural link connecting the Chengdu Plain with the Ganzi Plateau. The viewing platforms at both ends have become popular stops for self-driving tourists.

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