The setting of the warning red mark: it is set in the middle of two divergent lines with a center distance of 4m, that is, the distance between the warning red mark and the center line of the two lines is 2m.
Setting of warning signs: it is set in the middle of two diverging lines with a center distance of 4m, that is, the distance between the warning signs and the center lines of the two lines is 2m.
Setting of warning signs: It is set in the middle of two divergent lines with 4m centers apart, that is, the distance between warning signs and the center lines of the two lines is 2m.