At　the　present　time,　the　accident　in　tunnel　remains　at　a　high　level　all　over　the　world.　The　traditional　way　of　preventing　road　traffic　accidents　is　mainly　based　on　vehicle　dynamics.　Human　factors　are　taken　less　into　account.　In　light　of　this,　this　study　takes　on　a　＇people　first＇　philosophy,　using　physiological　and　mental　knowledge,　and　analyzing　the　relationship　between　the　driver＇s　physiological　and　mental　reaction　to　the　traffic　safety　of　tunnel　qualitatively.　Eye　tracking　and　multiple　parameter　physiological　detectors　were　used　to　measure　changes　of　the　pupil　and　the　heart　rate　as　the　driver　drives　through　the　tunnel,　concluding　that　the　driver　feels　tension　when　driving　through　the　tunnel.　Finally,　some　useful　advice　is　given.　©　2011　ASCE.