Optimization Method of Visual Guidance System at Entrance Zone of Expressway Tunnel Based on Visual Transfer Characteristics

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.