Don't get me wrong, I'm not saying all lights on 40 roads have filter lights that run 24/7, but in my experience, most do. I can certainly throw some local examples of filter lights not always being used as well, but I can also throw in far more examples of filter lights being the norm.(Original post by Twinpeaks)
There's a 40mph road near me, and people can turn right before the filter light goes green if there's no oncoming traffic.
I feel like the woman who turned right had a green light but was meant to have given way to oncoming traffic. That's the hunch I've got. I've known some people to be a bit confused with that sort of system.
Honestly, the crucial part we're missing here is the location. To me, a 40 MPH road is most likely a major A road on the edge of a town/city. And generally, filter lights are the norm on major A roads.
As for getting confused, I can understand one person getting confused, but there's witnesses. There are certainly a lot of idiots on the road, but I'd be surprised if not a single one of them knew how filter lights work. Can we not ignore the OPs logic though? It's basically a case of 'I didn't see it so it didn't happen'.
Check if you passed that exam!