This two-level interchange requires no more area than the conventional intersection with the same number of lanes.  
   

- It may appear the left-right off ramp-right merge interchange would require more area than the conventional intersection. However, the two-level interchange requires more volume, but the required area is similar to the conventional intersection.

- Therefore, there are differences in the gradation of the roads, but the area is similar to the conventional intersection.

Please refer to the diagrams below.

  
   
   
 
   

- The red lines on the top indicate the boundaries of the conventional two-way 8-lane / 4-lane one-way intersection. (excluding right turn loop)

- The Non-Stop Interchange by Roadnext has a small amount of right turn loop in addition to the area required by the conventional intersection.

- Some room must be given in the lane where the bottom road merges with the top road (A).

- However, there is little difference in the required area compared with the conventional intersection or SPUI (Single-Point Urban Interchange).

  
   
   
- Diagram 2 below illustrates left-right off ramp - right merge Non-Stop InterChange connected to conventional intersections on all 4 directions.  
   
 
   

- The conventional intersections and the non-stop interchange are both 8-lane 2-way (4-lane 1-way) roads. At first, the Non-Stop Interchange in the center of the diagram appears to take more area than the conventional intersection. However, most of the traffic islands seen in the non-stop interchange overlap the main roads.

- The left turn only lane can have a larger loop than the right turn only lane, but it is placed inside the right turn loop. As a result, left-right off ramp - right merge interchange requires the same area of land as the 8-lane 2-way traffic (4-lane 1-way) conventional intersection with right turn loop on the main road.

  
   
   

- Please refer to the photograph on the right.

- This is a photograph of Yangjae Interchange, an example of the conventional cloverleaf interchange.

- For the cloverleaf interchange, the loop for left tern (A) has the smaller radius r, and the loop for right turn has the larger radius R, and its area is the highlighted perimeter of the right turn only lanes.

- Applying left-right off ramp right merge non-stop interchange to an intersection shown in Photograph 3 would only require an area denoted by the smaller loop radius r and the area marked by red lines (including area B).

- It is possible to construct an intersection marked by red lines, because the intersections of the main roads are concave.

- We reiterate that the right turn only loop radius for non-stop interchange is identical to the loop radius r for left turn in a cloverleaf interchange. It is a non-stop interchange with 90-degree left and right turns rather than 270-degree turns.

  
 
   
   
- Such intersection area is seen in the conventional SPUI-type intersection as well as the conventional intersection.  
 
   
- Please be reminded the Non-Stop Interchange by Roadnext can be constructed in an area similar to those required by the conventional intersection or SPUI-type intersection.  
   
- The left-right off ramp - right merge Non-Stop interchange by Roadnext can be constructed in two levels in an area similar to the conventional intersection at a rated speed of 60km/hr urban traffic.