In order to explore the mechanism of the influence of the width of road edge rate lines on the driver's deceleration behavior, road experiments were carried out on the straight section of Expressway when the width of road edge rate lines (W) was 15 cm, 30 cm and 45 cm. Vehicle speed characteristic data were collected. It was found that the increase of the width of road edge rate lines can significantly enhance the deceleration effect. By introducing the concept of time frequency in the field of computer vision and analyzing the structural equation model, it is found that the edge rate lines width affects the driver's deceleration behavior from two perspectives of perceived speed danger and perceived Lane reduction. The path coefficients of acceleration and deceleration are -0.095 and 0.107 respectively by perceiving the danger of vehicle speed, and -0.044 and 0.034 respectively by perceiving Lane reduction. The width of edge lines and time frequency, initial vehicle speed and vehicle width affect the deceleration of drivers synergistically. Finally, through the change of light flow expansion rate in driver's eyes caused by marking and the time change of driver's eyes crossing marking, the mechanism of speed perception danger and lane reduction affecting deceleration behavior is explained.

CICTP