This item is an accessory or set of accessories for train model. It requires both cement and painting to complete or use.
These "crossover bridges" are a common sight in Japan, in heavily-trafficked areas; they're just pedestrian bridges, allowing those on foot to get across a busy street safely. Markings for signs (directions to various areas, like Nikko, Tokyo, Shinjuku, Nagoya, and others; road name signs, neighbourhood indicator signs, etc.) are included.