Some really thought-provoking posts here and they've made me wonder what exactly irritates me so about the tributes that I see on that particular road.
I've decided that it's not the fact that people want to mark the spot, it's the all-consuming need to make a big and often indiscreet display. Flowers at the scene are understandable - what I hate is the cellophane, paper, balloons, ribbons and all the other paraphernalia that they're wrapped in. Flowers would degrade naturally after a time, this other stuff doesn't.
Some of the tributes are extremely OTT. Perhaps you're thinking of the ones in your own areas and haven't seen some of the more flamboyant displays. There is also, sadly, some 'competition' on that stretch of road. Families (even in relation to the same deceased person), compete to demonstrate better their love for the person, larger and bigger items pinned to the lamppost... they bring stepladders apparently to cover the as far along the length of it as possible. Perhaps they might even invest in a Cherrypicker at some point? It looks distasteful (in my view), it reminds me of a fairground stall and again, in my opinion, does nothing to make traffic on that road safer.
At that particular road, there was a fairly recent tragedy where a man and his mother and father were killed in the car he was driving. His pregnant wife (almost to term) survived, but the baby didn't. It was horrific and it moved many people. The family put some flowers there but moved other tributes like teddies and the like away. They felt their grief was private and whilst they acknowledged the thoughts of the general public, it wasn't public grief, it was their own and not in public ownership. Once the flowers died, the spot was left unmarked but to the family and loved ones, it will always be poignant and visible.
Anyway, I've seen many tributes all across the UK and personally think that whilst some unwrapped flowers or a non-maintenance shrub would offend none, I know of many people who silently wish the teddies and ostentatious displays would stop. It is a difficult subject and my views don't diminish peoples' grief.
The dartboard-sized picture and fairy lights will be removed, no doubt about it. The council will have to act as it's dangerous. I think a board showing the accident rates for the year, as I've seen elsewhere, would be a useful tool in reducing the number of accidents there.
I agree that people have the right to grieve as they wish. I don't agree that people have the right to project that grief wherever and howsoever they choose when it encroaches past their own property.
On a separate but related point, I also feel that way about hoardings and birthday banners on bridges, the devoted family never thinks to remove them after the event, leaving someone else to pick up after them.