Japan Railway Hokkaido (JR Hokkaido) has proposed a 'vertical separation' scheme for its Yellow Line. This plan involves segregating the tracks into two levels, one for each direction, enhancing efficiency of rail traffic. While specific timelines are yet to be announced, JR Hokkaido believes this could revolutionize the rail transit system in its region, tackling issues like congestion and delayed trains.

Railways carry immense importance in Japan, with millions relying on rail transportation for their daily commute. Any measures aimed at improving the efficiency of Japan's railway system, especially in busy urban corridors like Hokkaido's Yellow Line, are typically welcomed by the public. Legal procedures will probably involve detailed safety and feasibility investigations before approval.

Similar to Japan, the US and EU also use rail separation strategies in densely populated areas to improve efficiency and safety. For instance, the New York City Subway uses a similar system in some areas. However, due to differences in geography, demographics and historical development of rail systems, the concept's implementation varies.