You should do what the cars around you are doing to pass that block. You shouldn’t blindly follow the speed limit as a strict unnuanced law regardless of what is happening around or in front of you.
No person shall drive a vehicle upon a highway at a speed greater than is reasonable or prudent having due regard for weather, visibility, the traffic on, and the surface and width of, the highway, and in no event at a speed which endangers the safety of persons or property
You should do what the cars around you are doing to pass that block. You shouldn’t blindly follow the speed limit as a strict unnuanced law regardless of what is happening around or in front of you.
What you are talking about, I think is called the general speed law. Basically as fast as road conditions allow. Above is from California https://california.public.law/codes/vehicle_code_section_22350