Uh, no. California also has a Basic Speed Law. If the posted speed is say, 35 mph, but yet everyone drives 45+ mph (so driving 35 will impede traffic), the 35 mph driver could be cited. And you'll find that communities have to adjust speed limits on their streets upward as a result.
Traffic Control When at or approaching traffic signals or signs, yield to pedestrians, bicyclists, and other nearby vehicles that may have the right-of-way. See Right of Way Rules: Who Goes First, in this section. Traffic Signals Solid Red Light A red traffic signal light means STOP. You can...
www.dmv.ca.gov
Nope, basic speed law only sets an even lower limit:
Says right in your link: "California’s “Basic Speed Law” means that you may never drive
faster than is safe for current conditions."
That statement doesn't give you a right to driver faster than the limit, only that in certain circumstances you may be required to drive slower (all the examples given are talking about needing to drive slower, not faster).
It never gives you an exception to
exceed the posted speed limit, it even makes a note: "Unless otherwise posted, the maximum speed limit is 55 mph on a two-lane undivided highway and for vehicles towing trailers."
There are some states that do give an explicit tolerance and allows you to go over the limit for certain reasons (like passing a vehicle), but California is not one of them.
MIT has a good overview of the speed laws of various states. You will notice most states are even stricter than California, they have a statewide absolute limit, while California allows limits higher than the general 55/65 mph depending on the road, and it'll be posted if it does. Only 3 states (Rhode Island, Texas, Utah, marked in green) explicitly allow you to drive faster than the speed limit if you can prove that it was safe for the conditions.
State Traffic and Speed Laws
Yes communities do adjust their limits upward, but you'll still get a ticket before the limits were adjusted. The car letting you set the speed above posted limit (sometimes well above, especially in TACC) is explicitly allowing you do something "illegal", just like "rolling stops".