Sorry to hear that James
I have to say that whilst it is fairly new, and yes it can cause a problem if you approach too fast for the conditions, it is there for a reason. The biggest reason is the school opposite.
I hope your mate is ok, and I will certainly highlight this area to my pupils.
Did your mate get any witnesses? As to the cause, was it speed? Conditions? Did he take any photo's as to take it up with Congleton Borough Council?