Anti-vehicle barrier

Description
The Anti-Vehicle Barrier is a wall of plasma energy used to stop vehicles and weapons, much like a shield door, except on a larger scale. It bears a resemblance to a Deployable Cover and the generator is the same as the Halo 3 Anti-Vehicle Barrier. Used by the Covenant, it was first seen in use on Harvest and on the Tsavo Highway, to prevent UNSC forces from reaching Voi.

Trivia

 * It's only effective in halting vehicles and projectiles: a soldier on foot can traverse it harmlessly.
 * It can be taken down by explosions near the shield generator on the side opposite the generator.
 * How this barrier works is uncertain. If it blocks a certain kind of metal, it should also block Spartans and Marines who also wear plate armor.
 * On Halo 3, the shield barrier can sometimes be destroyed from the outside