Improvements in the laying of channelizing lines of application means such as signal transmissions, energy and fluid conduction and other purposes, of the type that uses high voltage aerial line systems, essentially formed by support towers (a) of a set of high voltage conductors (b), which, by the upper side, include a guard wire (2) laid among the same towers; and this set of high voltage conductors, laid among the towers at a certain height from the ground, is arranged over the predetermined safety level (s); and in a zone delimited at the lower side by such safety level and inside the zone (p) protected by the guard wire, along all the distance among the towers, a tubular element (c) is arranged, which, laid on the same towers, has an external metalic sheathing (4) grounded and forming an internal longitudinal cavity that provides the channeling unit of said application means.