Trucker's Channels

Found this online:

Industry Canada (IC) has recently approved the four LADD Channel Frequencies for Radio Licensing. Companies or individuals with only one or two radios no longer have to wait for a letter of permission from an existing radio channel holder in order to license their radios. Their radio supplier can apply with IC in their behalf for the use of 154,100Mhz (Ladd-1), 158.940Mhz (Ladd-2), 154.325Mhz (Ladd-3) and 173.370Mhz (Ladd-4) in their IC approved VHF radios. Larger companies may apply for a commercial (shared) channel frequency if they have many mobile vehicles needing to be dispatched from an office base station.​