An Effective Idea

CFI is based on one of those flashes of insight that seem obvious in retrospect. When you remove points of conflict at an intersection, through movements get more green time and intersection capacity rises.

Since one of the biggest conflicts at many intersections occurs when left-turning vehicles cross oncoming traffic, modifying intersection geometry to eliminate the left-turn conflict can significantly reduce delay to through vehicles.

That’s what the inventors of CFI did, proposing a solution so original that it consistently outperforms both traditional and nontraditional intersection designs.