I found this map of city streets / roads / lanes and naming fascinating. It turns out that the naming of “street” or “road” is tied back to the time of when roads were made….

How many roads do you think lie within the border encompassing the City of London? The answer is NONE. Because there are no “roads” in London.

There are however a lot of streets, alleys and lanes. The reason that there are no streets called 'road' in the City of London is because the use of the word 'road' to indicate a byway did not emerge until the late 16th Century - a long time after most of the roads in the City of London were established and named.

The historical emergence of the use of Road as a name for streets in the late 16th Century can be observed in the road maps of most English towns and cities. Streets which were established before the 16th century are very unlikely to be called Road. Conversely parts of towns and cities which were built after the 16th Century are likely called Road.

A map looking at this here, which zooms and looks around the UK.