Abstract: A deck for dodgems (bumper cars) to form part of a travelling fair has a central portion intended to be fixed to a road trailer. Hinged to each major side of the central portion is a pair of hinged leaves each intended to form part of the deck when in their unfolded, coplanar, positions. To permit the major axis of the deck to be longer than usual, but without raising the height of the hinged leaves to an impermissible value for travel along roads, the length of at least the outer leaf of each pair is made adjustable. Each outer leaf includes a series of parallel stringers that are effectively of adjustable length, the stringers bearing three deck plates, of which two are fixed to the stringers, while the central one is movable relative to the other two between a coplanar position and a stacked position. This arrangement of the plates permits the distance between the inner and outer plates to be altered to shorten or extend the effective width of the respective leaf.