Abstract: A chocking device for restraining a heavy or oversized vehicle against lateral movement relative to the deck of a low bed trailer or the like. The trailer deck is carried, at least in part, by a pair of support members which extend longitudinally of the trailer and define parallel inwardly facing abutments in general vertical registry with an opening in the deck thereabove. The chocking device comprises a chocking frame for positioning on the deck in lateral bridging relation to the opening. Depending restraining members mounted in fixed position on the lower side of the chocking frame extend through the deck opening and are disposed in engagement or near engagement with the abutments on the support members. The laterally opposite end of the frame define chocking surfaces which cooperate with laterally inwardly facing surfaces on laterally opposed wheels or tracks of an associated vehicle supported on the trailer deck.