A vehicle gate assembly includes a first post and a latch post comprising a J-slot formed along a face of the latch post, the J-slot comprising a primary vertical slot extending from an open top end of the primary vertical slot at a top side of the latch post to a bottom end of the primary vertical slot, a horizontal slot extending from the bottom end toward the first post, and the horizontal slot comprising a trap extending toward the top side of the latch post and a beam movable between an open position to allow vehicles to drive through a vehicle passage and a closed position blocking the vehicle passage, and a pin extending from the beam, the pin disposed in the J-slot when the beam is in the closed position.