Trans-Canadian highway

I have been considering driving from East to West along the trans-Canadian
highway. I have read a report that the highway surface is not in good
condition in many places due to the effects of severe weather (winter),
that it is mostly a 2 Lane Hwy, that it is not recommended for
automobiles, and that there are a very large number of big trucks that use
the road. I am concerned because I have a bad back and need to drive on
roads that are smooth and well surfaced. No one I know has traveled the
road. I am traveling in an Acura 2 Wheel Drive car.
Any thoughts, comments, or suggestions would be sincerely appreciated.
I thank you all in advance,
Harry