Abstract: A universal traversing assembly for legs of cranes or the like comprises: a platform provided with a series of driving wheels and supporting wheels which are aligned and are adapted to roll on a long underlying rail for the traversing motion of the leg; a box-like tunnel which rests on the ground, is open in an upward region, and has a portion of the rail fixed to its base; at least one pair of idler wheels, which are freely mounted on the platform, are mutually coaxial and are arranged below a pair of upper guides which are fixed on the tunnel at the upper opening; a rack which is fixed to the side of the rail portion and is adapted to mesh with pinions which are rigidly coupled and coaxial with respect to the driving wheels; at least one motorization unit which is rigidly coupled to the platform and is coupled to at least one of the driving wheels and pinions; at least one stabilizer which comprises at least one ground resting foot which has an adequate surface, can slide vertically and is adapted to move f

Abstract: A steering assembly for means of transport comprises at least one truck supported by a supporting structure which is rigidly coupled to the means of transport and has, in an upward region, a central center bearing for the coupling of at least one axle so as to allow rotation about a vertical axis; the axle has, at its two ends, wheels which rest on the ground or on another support; the wheels are provided with electric or hydraulic motors or the like which are controlled by an electric and/or electronic control device and are adapted to produce the rotation of the axle.