SPEED LIMIT according to posted sign.

[mrs]

Unfortunately is not the same. Your limit is what you set when there is no traffic. It would be usefull based on signs but Volvo never had it
There is no official description on why is called AVSL. Most likely SL is the normal one, Speed Limiter and ASL, Automatic Speed Limiter. Thats what Volvo website shows

Yes, bad that not work road sign info + acc, like it works at Audi, VW predictive-ACC, which work in way if we use auto pilot it set speed according to road signs info to acc.