I missed this post and the original printed report (I was probably still recovering from the Faversham Hop Festival weekend).
However I did come across the report some months ago and looked at the article.
The first thing that struck me was that it was unlike any section of exposed Roman road I have ever seen. Attempting to delve deeper into the report turned up no supporting evidence nor indeed any more details on the find. I then forgot about it....
A few days ago the latest edition of Kent Archaeological Review (no 203 Spring 2017) dropped through the letter box. I finally got around to reading it today and found an article about this section of 'Roman road' by local Rochester/Medway archaeologist Alan Ward.
It is a long article (pp 124-135) so even paraphrasing is not really possible.
The thrust of his argument is the quality of the surface. As I noticed it is unlike any roman road I've ever seen. There are no wheel ruts or hollows from foot traffic. Nor are there any signs the surface has been exposed to 2-3 or more hundreds of years of rainfall and frosts.
The line of the Roman Watling Street through Rochester is known, as is the ditch each side of it. This section of road is beyond the road and ditch line.
Finally. All of the known roman roads in Rochester were constructed of compacted gravel. As were they all in Canterbury, Dover, Winchester and London.
There being no detailed report of the 'dig', he offers no suggestion of what he thinks this surface may really be. Dressed Roman stone in Kent is extremely rare. It was fairly common after the Norman conquest and into the medieval period.
It will be interesting to see is the archaeologists who produced the original 'press release' now respond to the serious critical appraisal on the 'find' and respond in the future with more detail.