Age Requirement?

I agree, it isn't a legal issue - just a choice one and if employed, a company issue.

I know a few truckies who take family along and I don't see a problem with it, personally!

Oh and although you may be American, in addition to the previous persons comment, thankyou too and your colleagues for keeping Australia running too :-)

Stay safe :-)

The laws are the same as if you were in a car but if this rig is a companies and not yours then dont do it because the company will no allow it, to much liability............and if it is yours where would you mount the car seat ????

That may depend on the company you work for, unless you are an owner/operator then its your call.

I've never seen an age requirement at DOT level, but check the state DOT to confirm this.

Hope this helps and thanks for keeping America running.