位于亚热带的台湾长公路隧道的空气温升问题颇值重视，雪山隧道初期只通行小型车，空气温度最高约40℃，就已成媒体的焦点，对即将通行大客车提出质疑。利用现场监测温度分析隧道壁的吸热能力，并据以推估下阶段之可能温升，发现若未启动通风设施时确会高达51.5℃；但只要启动风机应可控制在40℃之下。

Taiwan is located in the subtropical zone,and the temperaturerise problems which possibibly occur in the long tunnels of freeway should be emphasized.After the Completion of the Syueshan tunnel,in the beginning only the passenger cars are permitted to pass through this long tunnel,and now the highest temperature in the Syueshan tunnel is under 40℃, in the next stage facing the situations of opening buses passing through Syueshan tunnel,it is estimated that the temperature will rise to 50℃,and schemes of cooling should be adopted.After the acting of the Ventilation System in the tunnel,the coolingeffect will make the highest temperature remain under 40℃.