The Michelin map gives bridge weights and clearances. There aren't many overhead structures at all. Morrocan lorries can't have much idea how heavy they are. It seemed however big they are, and whatever they're carrying, they get filled exactly flush with the top of the bed sides. One artic like this we followed as it came out of a quarry very slowly, sped up downhill, and the outside rear tyre exploded at the first bend.
Some routes we did had bridges marked on the map as 5 ton, but because the scale is so big you can never be quite sure which ones they are. Many don't look like they'd take that much, but the 5 ton signs seem long gone. Is that because the sign has been nicked, or someone has rebuilt it more strongly since? Looks like the former! But I can't see how local trucks can often know what they weigh anyway!
The suspension bridge at the east end of Bin el Ouidane has I think 12 tons on the map, but the signs say 5! Locals said it has always been 5?! But I don't think you can wade that even in a Zil