I was searching StreetView in the UK for a particular road sign but when I got to the location I saw this:
Why has Google blurred out the street name, but only one part of the street name?
Other views haven't blurred out the name, but in those the sign is either further away or more edge on.
I can't be for privacy reasons – after all knowing where you are is the point of Street View.
Best Answer
Google Maps: Street View: Privacy and Security (UK version)
I bet that it's a false-positive for a license plate. You could always use the "Report a problem" link at the bottom of the page.
(For what it's worth, it's blurred for me here in the U.S.)
From the Google Maps support forum: