Maintaining VFR altitudes when following N/S roads/rivers

Mxsmanic opined

If you are following a road or river or other feature on the ground while
flying VFR, and that feature runs north/south but often veers off to one side
or the other, are you expected to change your altitude each time you move
from a heading of 0-179 to 180-359 or vice versa?

To actually answer your question, hemispheric rules only apply if you are 3000'
AGL or less. If you are IFR (I Follow Roads), you are likely to be under 3000'.

-ash
Cthulhu in 2008!
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