Improvements in lane management at JCT
The lane management method for merging and branching sections aims for a safe and smooth management of lanes adapted to their environment, taking into consideration the traffic conditions, road shape, and traffic jam issues associated with changes for lane management.
Improvement of merging sections
For merging section where a two-lane route and another two-lane route merge to form two lanes, the routes that merge prior to the JCT are narrowed down to one lane, and the two routes with one lane each merge into one route with two lanes.
Improvement of branching sections
The branching section that branches from two lanes (or three lanes) to become two lanes, is changed to one lane each that branches to the left and right respectively.