diff --git a/README.md b/README.md
index 71bb9c9..d30a9f3 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ Gathering information for a global "one stop shop" free open data live traffic p
 ## sources
 
 - https://autobahn.api.bund.dev
+- https://trafficview.org/introduction/#faq
 - some kind of anonymized user-contributed data via existing/participating apps (OsmAnd / OM / other plugin)
 
 ## alternatives