A lateral suspension assembly for a guided vehicle system includes a pair of lateral wheel housings each including a lateral wheel rotatable about spaced vertical axes for engaging spaced opposing guide rails of the guided system; a lateral limit link for limiting outward travel of the lateral wheels beyond a predetermined limit; a pair of spaced support arms pivotably attached at one end to the guided vehicle and at the other to the lateral wheel housings; and a biasing device interconnected with each of the wheel housings for urging the lateral wheels in contact with the guide rails.