There’s a section of 710 S Freeway in Los Angeles that is labeled as 45mph and I believe it should be 55mph.
https://www.waze.com/editor?env=usa&lon=-118.17310&lat=34.05775&s=70489366&zoom=3&segments=4674237
According to a map comment left by citeman, state manager for CA, this speed limit is correct. Has something changed recently (in the past 3 months) to change this? Your best course of action would be to send him a PM to see about getting it corrected; I’ve pinged him in Discord, as well.
There has been lots of construction along the 710 and the SL signs have been changing. I will try and get in that area soon to confirm the latest.