22. The P-130-3 sign announcing a lane or tunnel prohibited for drivers of vehicles carrying dangerous substances referred to in section 43 of the Transportation of Dangerous Substances Regulation (chapter C-24.2, r. 43), indicates the prohibition for those drivers to use that lane or that tunnel.The P-120-6 sign announcing a mandatory lane for drivers of vehicles carrying dangerous substances referred to in section 43 of the said Regulation indicates the obligation for those drivers to use that lane.