Gravity bridge
From Halopedia, the Halo wiki
The Gravity Bridge is a technology only encountered in Halo 2. It is seen in gameplay in the level Gravemind and High Charity. The way it works is not really a bridge as such; more of an escalator. Whoever enters the anti-gravity field will immediately be carried to wherever the Bridge's final destination. They are fairly fast and are one of the main means of navigation within the Covenant homeworld.
