I Can't see the restrictions ever being lifted now. As an analogy, have you noticed the warning signs for "Z" bends and sharp curves in the UK? They stay there forever, even though the winding country lane that existed when they were needed is now a major highway, four lanes wide and superbly engineered. If the signs were removed, someone might have an accident and sue the highway authority for not giving advance warning of an acknowledged hazard, even though it no longer exists. Not a risk that any jobsworth is going to take.