I became a Teamster LTL city driver back in 1966.
Before the days of GPS,I learned how to get around with maps & street guides.
I also learned the heights of low tree limbs,utility wires,& bridges,by a simple test.
To ease up & look see if my trailer was above,or below,if below I went on under,if not I got assistance to back away.
During my entire 45 year trucking career I never used a GPS,I kept pretty safe by being old school.
So for anyone to put their total trust in a digital device,for their livelihood,seems a bit crazy to me.