I did not see the sign on my survey just over two months back and a quick glance on StreetView shows the sign says the street name with private way under the name. It doesn't mean that access is restricted. 

From the Wiki: "Note that it notes access, not ownership. Many privately owned roads are freely accessible for the public without prior permission- in such case access=private would be wrong and it may be access=permissive if the owner can revoke this permission at their own discretion. Privately owned roads can even be -depending on the legislation- public roads in the sense that the owner has a legal duty to allow the public access and is not free to revoke this permission (access=yes)."