Teslas do not currently detect speed limit signs at all. They work off a database which gets updated from time to time.
Several streets near my home have had speed limits changed since I got my Tesla, and it sometimes takes months for the database to catch up.
Re:Tesla Software Version 10.0
by RealWorldPolice on Friday September 27, 2019 @02:16AM
(#21088977)
There is no speed limit sign detection...
A lot of them are the norm. These are the most common complaints amongst Tesla users and they’ve gone unaddressed for far too long.
How did you come to this conclusion? I’m an owner, and frequent various forums, and have never had these complaints, and can not recall seeing them. That’s not to say that they don’t exist, but I question your assertions here.
Same here! I visit many Tesla related forums and subreddit pretty much daily and also do not typically see these so called "complaints".
They pop up once in a while but not to the extent many people (often times from people don't even own one) claim.
Both speed limit sign detection, and self driving on the freeway worked flawlessly for me.
I guess YMMV.