Pieren
11
Yes, street names are always in public domaine (PD) but…
Many governements around the world publish documents with restricted access/usage. They don’t want that the work and money spent to collect the information is directly reused by e.g. commercial organisations for profit.
I didn’t look your document but it is always good to find the terms of use or the licence on which the document has been published. If you don’t find any clear statement saying that “commercial reuse” is permitted (as it is a classical restriction to public data collections), then it would be good to contact them directly, explain OSM and its licence and ask them if you can use their documentation for the project (possibly by sourcing the data).