when I first sat for my car licence 45 years ago, there was a question on approaching a road hazard, the answer was- When in doubt slow down, If still in doubt, STOP!
These big rigs still travel reasonably quickly, if in doubt, drop back 5 kmh slower than him for awhile, in 10 mins it will be well ahead,
or just stop, have a cuppa and enjoy the scenery for awhile.
Hell, you''ve got your home with you. LOL