In Newtown, Johannesburg there is a stretch of the De Villiers Graaf motorway motorway known as the 'Double Decker'. The Double Decker is actually a bridge like structure consisting of two reinforced concrete deck superstructures, directly above each other supported on trestle like piers.
These massive concrete piers has become a magnet for graffiti artists and many of the piers and the surrounding buildings are covered in graffiti.