even if they are going over the speed limit.

https://mwg.aaa.com/via/car/illegal-drive-left-lane#:~:text=California%20laws%20specifically%20target%20slow,violation%20with%20a%20potential%20fine.




"In California, and many other states, the law generally requires slower traffic to keep right, regardless of whether you are exceeding the speed limit. While driving over the speed limit might not be the safest practice, it doesn't negate the "keep right" rule."

https://www.google.com/search?q=keep+right+over+speed+limit&rlz=1C1VDKB_enUS1151US1151&oq=keep+right+over+speed+limit