This is a Google Earth satellite photo of the Royal Observatory in Edinburgh. The weather station, at 55°55′22.71″N 3°11′17.69″W is the white box in the middle of the grass circle. Of concern is not just the nearby roads, but also the buildings. It appears the station is almost completely encircled by tall buildings.
This means that the heat from the buildings will significantly bias the temperature, and reduce wind which adds further bias.
You’d think top scientists would know better?