# Study on the Eye Movement Transfer Characteristics of Drivers Under Different Road Conditions
## 4 Fixation Shift Analysis
### Smooth Distribution of Fixations  
The probability analysis of the smooth distribution of the driver's fixation area under four different road conditions (turning, straight, uphill, and downhill) is shown in Table 1. This paper reveals the pattern of driver's visual behavior in different driving situations. First, from a commonality perspective, drivers' fixation behaviors under all four road segments show a high degree of focus on the road ahead, with total smoothness probabilities exceeding 67%, reflecting drivers' prospective need for road changes. However, the variability lies in the fact that the driving demands of the different road sections resulted in different levels of the driver's attention to other areas. In the turning section, the driver focuses on the near front and far front (0.277 and 0.214, respectively), which is consistent with the high level of attention to road conditions and turning angle when turning. Meanwhile, the high probability of fixation on the left side of the road (0.219) suggests that drivers also need to focus on the left side of the traffic environment when turning. The lower fixation probabilities (0.064 and 0.075) for the sight glass and dashboard reflect the fact that drivers mainly focus on the road conditions in front and on both sides when turning. For the straight ahead roadway, the distribution of drivers' fixations was relatively balanced, with lower probabilities of 0.194 and 0.134 for the near front and far front, respectively, indicating that drivers paid more attention to the surrounding traffic environment and the dashboard. The fixation probabilities on both sides of the road (0.195 on the left side and 0.155 on the right side) are more balanced, reflecting a moderate monitoring of the surrounding traffic when traveling straight ahead. The higher probability of fixation on the dashboard (0.181) shows that drivers pay attention to vehicle conditions and driving information while traveling straight. Overall, the pattern of fixation in the straight ahead section indicates that drivers maintain moderate attention to their surroundings and vehicle information. In the uphill section, the distribution of drivers' fixations was mainly focused on the near front and far front (0.188 and 0.208, respectively), suggesting that drivers focused on changes in the ramp ahead and possible obstacles. The relatively high fixation probabilities for the left and right side of the road (0.212 for the left side and 0.167 for the right side) indicate that it is also important for drivers to monitor both sides of the road, especially potential obstacles or traffic dynamics that may be present when traveling uphill. The lower probability of fixation on the dashboard (0.102) and the lower probability of fixation on the view mirrors (0.123) suggest that the driver pays less attention to vehicle information and concentrates more on the safety of the road in front of and around him when going uphill. On the downhill section, drivers' fixations were mainly focused ahead, consistent with the high level of attention to the road gradient on a downhill slope. The fixation probabilities for the left and right side of the road (0.223 for the left side and 0.180 for the right side) were more balanced, indicating that drivers still need to be alert to traffic on both sides. The lower probability of fixation on the dashboard (0.121) and the lower probability of fixation on the sight glass (0.092) suggest that drivers pay more attention to the changes