-Number of legs of the fork-The angle of intersection-Visible phase.-Road concept.-Supplementary traffic channels.-Use the island divides the traffic.-The stiffness of the road surface.
- The number of legs of the intersection - the corner of the intersection - term vision - the road - the extra traffic - traffic using the divided island - the friction of the road surface.
- number of legs of a - - phase angle of intersection sight - - Ridge Road Lane accessories - using the dividing island การจราจร - friction of the road surface.