There are many variants of this.
The one that springs to mind for me is the northern end of the Elland Bypass where a dual two lane road reduces to a single lane, and without the signs queues were extending back some distance along the bypass.
With the signs drivers formed two lines instead of one extra long one that stretches back a good 800-900 metres and reduced the overall wait times for traffic. They’ll be removed soon as the bottleneck is being widened in the near future.
There are valid uses for them in a permanent context but as they’re non-prescribed for this purpose you’re never going to get a site specific approval.