They mean 'Weak Bridge'
Introduction
The photograph on this page of They mean 'Weak Bridge' by Jonathan Billinger as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Jonathan Billinger Taken: 16 Sep 2015
This relic of the early days of motoring and steam trains has to take some kind of dubious prize for gobbledegook. Still in correct position on the western approach to the railway bridge, Bridge Lane, Instow. The notice on the opposite side is also still there.