Under Part 107, operating a small UAS from a moving vehicle is:
AProhibited in all circumstances
BPermitted only over sparsely populated areas✓
CPermitted only in Class G airspace
Why →Under 14 CFR § 107.25, operating from a moving vehicle or aircraft is permitted only over sparsely populated areas. It is not permitted over populated areas without a waiver.
The trap →The FAA allows moving-vehicle operations, but only over sparsely populated areas. Airspace class is irrelevant here: population density is the deciding factor.
Field note →Agriculture and infrastructure inspections often use truck-mounted operations in rural areas. This is legal under Part 107 without a waiver as long as the area qualifies as sparsely populated and the drone is not transporting another person's property for compensation or hire.
SOURCE → 14 CFR § 107.25CHECKED JUL 16ACS I.B.K6EASY