She was driving erratically, as I understand it.
driving erratically
= = =
When I am in a unfamiliar city, much of my driving may be called ‘erratic’
Driving slowly to see street markers at intersections.
Dodging potholes.
Changing lanes at the last moment, when it is hard to see ‘must turn left’ or ‘must turn right’ arrows ahead of time.
Driving while black can be dangerous.
She’s the one the cop who wanted her to put out her cigarette.