80s car racing

Right at the beginning, a woman is driving fast on an empty road,
stops the car and gets out to change the speed limit sign.

I've only watched a few minutes of this movie - around '84.

Sounds like Cannonball Run II

Does this look familiar?

Ha, it must be!
Thank you.

Strange thing, I have actually seen this movie later, but maybe not from the very beginning.
I'll have to watch it again.

That scene could also be from the first one, The Cannonball Run (1981)

It is the second one
watch?v=Hi4ccVBsZEM