The Bridge is a 5 vs 5 map that ends when one team captures enough points.
The objective of The Bridge map is to control flags (pylons, which are crystal shards floating in the air) in order to gain points and once you have enough points your team will win. There are three pylons in this map: one near both team bases and one in the middle. This map is symmetrical from both sides (except for secret passage passage way on the left that allows you to get into the enemy base.
To end the game quickly, just capture all of the plyons.
You can either guard your own pylon, capture another pylon and guard it as well and hold out until the match ends or take all three pylons and defend them (which is the harder option).