Full Metal Combat is a collection of mecha based games that all take part inside the Metalverse. Current focus is on the "FMC: Generals" title which is a turn based strategy card game where you play as an invading General trying to take over land important to your nation.
This is one of the "District Bridges" they connect each District to another. Before you can use them of course you need to be of sufficient Rank and defeat the two guards that protect the bridge.