Conspicuity Research on the Highway Roadside Objects: A Simulator Study

Figure 4

Relationship between the mean legibility distance and the contour size under 60 km/h, where the relationship between the mean legibility distance and the contour size under 60 km/h was for triangle: 𝑦=135𝑥^0.486 and 𝑅²=0.907, and for round: 𝑦=105𝑥^0.513 and 𝑅²=0.908. 𝑥 represents the size of the roadside object, unit is square meters, 𝑦 represents the mean legibility distance, unit is meter, and 𝑅² represents the degree of fitting, describing how well it fits a function.