A track renewal machine is equipped with a ballast conveyor band extending in the longitudinal direction and arranged between upper and lower tie transport units and between ballast receiving means and ballast distributing means. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of interest, in the presence of a catalytic system. The outer peripheral body comprises one or more generally axial slots, each slot having one end that opens into the first axial bore and another end that opens into the second axial bore. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The latch, when attached to said side wall, is engagable with the hood to retain the hood in the closed position.