The most impressive section of the expressway is the 12.9-km Hsuehshan Tunnel, which is the second longest tunnel in Asia and fifth longest in the world.
北宜高最引人矚目之處，在於全線有 5 個不連貫的隧道群，其中長達 12.9 公里的「雪山隧道」，是亞洲第二、全球第五長的隧道。