Local authorities in Japan are considering expanding regulations on underpasses. This comes amid rising concerns for public safety, particularly regarding the risk of accidents in these spaces. Specifics of the potential changes are yet to be decided, but they may include tighter restrictions on vehicle size or speed, enhanced lighting, and improved signages.

In Japan, underpasses are integral to many urban road systems due to the densely populated cities. Thus, how they are managed carries significant social implications, especially around issues of safety, efficiency, and utility. Japanese people highly value orderly conduct, which is often reflected in their rigorous rules and guidelines.

Similar to Japan, issues regarding public safety and infrastructure are also important in the US and EU. Road regulations and safety measures are constantly reassessed and updated. However, the degree to which underpasses are used and the specific regulations imposed can vary greatly between different countries, cities, and even neighborhoods.