Per this wiki https://it.wikipedia.org/wiki/Strada_statale_487_di_Caramanico_Terme, last modified Jul.2020, part of the 487 needs renumbering to SR487 although km mark 26 and 27 on the prov. of Aquila side still say SS487 in the direction of Passo San Leonardo past Sant'Eufemia. The experts may decide what's proper, what you see roadside, or what the papers say.