To analyze the influence of visual guidance at the entrance of an expressway tunnel on a driver's vision, 30 drivers were selected for simulation tests, and the drivers' visual parameters were collected by a tracker. The human visual zone was divided into five regions to analyze visual transfer characteristics. The results showed: (1) In the analysis of fixation points one step transition, the greater form of transition probability of drivers' fixation points was respectively near front-near front, top front-top front, and top front-near front. After the improvement, the greater form of transition probability of the fixation points was far front-far front. (2) In the analysis of fixation point's stationary distribution, the fixation points appeared in near front of the road with a high probability. After the improvement, the drivers' fixation points appeared in far front of the road with a high probability.
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