- The duration of green light for the TLSI is more than twice that of the conventional intersection, and the delay time for vehicles reduces to 1/3.

- The conventional 4-way intersection has a 4-phase signal with green-red-red-red cycle, while TLSI has only 2-phase signals with green-red.

- Less waiting time for vehicles means shorter red light, resulting in a fewer vehicles stopped at the intersection.


- Drivers feel comfortable with the TLSI, since both top and bottom parts of the intersection follow usual traffic patterns of conventional intersections.

- Conventional traffic pattern allow left turns to be made from the left lane toward the center divider, and right turns from the right lane toward outside of the road.


- Much greater synergy can be expected when ITS (Intelligent Transport System) is applied to the TLSI than to the conventional intersection.

- The signal systems of the top and bottom of the TLSI operate independent of each other.

- For example, the signal system of the bottom is not affected when the signal timing or cycle changes on the upper part of the intersection, because the signal system of the top and the bottom operate independently. (Although the signal system of the top and bottom are different, their operating principles are identical.) As such, it is easier to apply the ITS system.