Right now, I suspect that Tesla gets its speed limit data from OSM, but I can’t prove this.

I drive a Tesla Model 3 around Canberra suburbs. When it uses Traffic Aware Cruise Control, it apparently relies on OSM data rather than the speed limit signs. This can lead to situations where TACC will use an incorrect speed limit (eg. 80 km/h in a 60 km/h zone). See osm.org/way/668268353#map=19/-35.24389/149.13545&layers=TD How can such speed limit data be kept accurate and up to date? This is what I aim to find out.

See also https://www.youtube.com/watch?v=t9kMHt_Pf6A