These areas are part of the cabin, was mainly used for messy storage. Citroen designed this truck and it was called the "Belphegor"
Added by Jacques PETER on 16 October 2013.
I thought the idea of these extra windows was to give the driver a view of the road up close to the front bumper to make maneuvering easier in tight spaces?
One feature of this design was the headlight pods, which looked as if they were designed for quad headlights - but I never saw one which actually had four!
Added by Michael Feldman on 16 October 2013.