I'm guessing some sort of legislation would be applied. In that point of view workwise it's much easier to apply for the principle rather than argue at several set of lights against a the principle going the other way and be told no, n times. For example in Sheffield a really big issue for cycling is the ever growing number of one way streets, no right turns or no entry signs making it increasingly difficult to cycle anywhere. It would take forever arguing against every one of these schemes or cost a fortune in frigging contraflow cycle lanes so people have argued there should automatically be an exception for cyclists.
I can't see much benefit to cylists on an automatic go left, there are however an interesting number of junctions knocking around the country that deal with the issue in different ways. I can see a benefit in a go straight on on a main road on a T junction when safe though.
Edit: actually that said there were a few junctions elsewhere I came across that would benefit enormously from a go left on red when safe but that's because the idiots designing the junction had laboriously long sequences of lights from the dreaded filter. You can't really win either way. You have filters and you give people additional safety but people RLJ. You don't have them and people are less likely to RLJ but more at risk of a collision. When I say RLJ I'm primarily talking about cars here.
I can't see much benefit to cylists on an automatic go left, there are however an interesting number of junctions knocking around the country that deal with the issue in different ways. I can see a benefit in a go straight on on a main road on a T junction when safe though.
Edit: actually that said there were a few junctions elsewhere I came across that would benefit enormously from a go left on red when safe but that's because the idiots designing the junction had laboriously long sequences of lights from the dreaded filter. You can't really win either way. You have filters and you give people additional safety but people RLJ. You don't have them and people are less likely to RLJ but more at risk of a collision. When I say RLJ I'm primarily talking about cars here.