Yes, this whole pipeline is apparently part of an abandoned gas pipe line that is incomplete and as yet, abandoned. (To do with Odebrecht apparently?) The section 100m to the W of this note (where it bends from WSW to WNW) is very steep (over 45 degrees incline) and therefore no cars can use this. Therefore this "service road" could perhaps be changed to a path. People could probably follow this "road" for a long while, but there may be very steep sections in parts.