There is no expectation of privacy with what happens on a public road.
See all the dashcam videos on YouTube.
See all the dashcam videos on YouTube.
There's a common misconception that there is not an expectation of privacy in public but this is not supported by the law. The notion does not help people but does help those that wish to surveil. Be careful with this claim.
IIRC they were sued about identifying people and car plates.