-
Yes. Although such situations are only really likely to arise where there is no pavement and walking wouldn’t be any safer than riding. It’s a little unclear if you can ride an illegal road if it’s no longer of the classification that makes it illegal. I stumbled across an incomplete motorway which I was told by a worker I could cycle on. Best course is take your best judged course of action and document it.
On a similar note I had to take what I suspect was a banned tunnel as the tunnel was being worked on and the alternative had become a one way in the opposite direction.
The only time I was glad to be out of classification and not really have to worry about that head ache :-)