Diógenes de Sinope
Thanks for solving the map notes I posted angolasandy.

are you sure?
https://www.mapillary.com/app/?lat=-12.630105209549&lng=13.358873762203&z=17&focus=photo&mapStyle=OpenStreetMap&pKey=914237852750471

I think that it is fair to say that they are highway surveillance cameras rather than speed cameras