I suspected that was the problem. You would think there would be an open source database of speed limits though I suspect that like the UK there isn’t one…
I did note yesterday that there are two new roundabouts on the N106 north of Penafiel. One is finished and the other under construction. They are situated near 41.2152119, -8.2876225.
I haven’t been able to add these since they are too new to be shown on aerial images.
Perhaps somebody nearby could add them…