Cb Side Bands More Specifically, Do Over The Road Truckers Use Single Side Band (which Channels) Or AM CB Radio?

More specifically, do over the road truckers use Single Side Band (which channels) or AM CB radio? - cb side bands

Channels 17 and 19 are used most frequently by all, including truck drivers. Even if you have the option of side-band, the rule of courtesy only on channels 30 and older be used. Channel 9 is due to an emergency channel, but the only time I did, I could not find anyone to answer to.