If you have ARCADY then you can benefit from the automatic 2-way transfer of data between it and Junctions. This page lets you choose what you see in the head up display (HUD).
Click Arcady in the left hand pane. The Arcady page is displayed. Select Enable ARCADY Link to invoke the link for this junction.
If you have a compatible version of ARCADY installed with the link feature enabled, then ARCADY starts automatically and, by default, minimised.
Currently the link only supports normal roundabouts.