Garmin is American. In North London it used to say:
"Turn North onto the Great North Road"
No one has called the A-1 the "Great North Road" since the Romans went home, UK road signs use place names and road numbers and the junction is a roundabout with five lanes and traffic lights.
The correct instructions would be something like "get in the third lane to take the fourth exit, following A-1 Welwyn/St. Albans".
In the USA "Highway 1 North" is on the signs, but that's not much use anywhere else.
Andy
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