300 AADT means 300 vehicles per day average traffic.
If there is zero traffic at night - that means 150 cars each direction over 15 hours.
Or 10 cars per hour. Given a "rush hour" in the early morning and late afternoon -
You might have 6 cars per hour - on average - during the day - or one every 10 minutes.

I don't need a shoulder with an AADT of 300.
And I don't hear the noise of 8000 vehicles or smell the exhaust.
And you find empty backroads by using state/prov traffic maps.

After 100,000 miles - - Just sayin'.

Pix -
Pandora Road, east of Rosalia, Washington
Old Trail Road near Larwill, Indiana