animation
 
 
   

- The top and bottom parts of the TLSI have the same operating mechanism as that of SPUI type roads.

- In other words, the TLSI by Roadnext is innovative, but drivers would feel the traffic signal system same as that of the conventional intersection.

 
   
 
   
- The diagrams above are schematic drawings of actual SPUI (Single-Point Urban Interchange) intersections in Seoul (Yangjae intersection, Karak Market intersection and so forth).
 
   
- The green highlighted portions of the two types of intersections are identical. The photograph below shows 2-Level Signalized Intersection currently in use.  
   
   
 
   
   

- This is an aerial photograph of Karak Market intersection in Seoul.

- The colored portion of the intersection is identical to the top or bottom of the TLSI invented by Roadnext.

- The TLSI by Roadnext has two of the colored portion of the SPUI-type intersections each on the top and the bottom of the intersection.

 
   

- This is the same intersection, and the highlighted portion on the left is the same.

 
   
   
 
- Hightlighted portions of Gaepo intersection in Seoul and Yumgok intersection in Seoul are equivalent to the parts of the TLSI.  
   
- This is the same SPUI-type intersection as Garak Market intersection, but the traffic island and radius of the loops are smaller than those in Garak Market intersection  
   
- The following intersection is an example of a conventional intersection with a similar area as the SPUI-type intersection.  
   
   
 
 
- The area required for TLSI is similar to the area of the SPUI-type intersection.  
   
- It is clear that the TLSI is a new type of intersection in terms of signal operation, but it is essentially similar to a conventional intersection in terms of its size and shape.