I recently got access to the new Google Maps. I did some poking around and closed the app. But looks like Detached09 on Reddit found something interesting in the color of roads, especially in Britain. Eventually, a discussion on Reddit pointed towards the color standards used on Worboys direction signs depending upon the category of the route.
Three color combinations are used on Worboys direction signs depending upon the category of the route. All roads are categorised as either motorways (white on blue), primary routes (white on dark green with yellow route numbers), or non-primary routes (black on white) (Wikipedia)
Color Codes and Their Meanings
For ease of reference, the main colour-coding rules are summarised in the table below: (via Wikipedia)
|White||Red||Black||Ministry of Defence sites|
|Green||White||White with yellow route numbers||Primary route||Worboys|
So, that’s what we have for now. I will update you all if an official documentation on this shows up anywhere!