



 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
(SinglePoint 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 2Level 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 SPUItype 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 SPUItype 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 SPUItype intersection. 











 The area required for TLSI is
similar to the area of the SPUItype 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. 


