"Richard" wrote ...


I have a vague memory of seeing a red filter arrow in France. Quite
intuitive after you've got over the surprise.


Yes, fairly normal in France, as is the more sensible Red to Green with no
amber (actually used within the British Isles as well - Jersey for example).

Mind you, our lights are far better when it comes to visiblity. The French
lights are so dim that they almost disappear in daylight!