This advertising mast is not a standard mast and is also called ‘the box’. You will find ‘the box’ along the A4 near Hoofddorp. ‘The box’ has two digital billboards: one facing Amsterdam and one facing The Hague.

The A4 runs from Amsterdam to the Belgian border at Zandvliet, via Leiden, The Hague, Delft, Rotterdam and Bergen op Zoom and is 125 km long. The highway is also in the top 10 of morning and evening traffic jams.