That is not to say that the plans of the Maison Clarte are not interesting, quite the opposite, they represent a striving towards something that would only fully realise itself in the Unite d'Habitation. To do this, he had to take a radical view of the section, and a normative view of the plan; the inverse of the situation demonstrated at Maison Clarte.
In Clarte, it's the plans you are directed to, and they show, in an embryonic way, how Le Corbusier was trying to nestle 'units' of two story dwelling within normative construction. However to do this, he realised it was no longer the planning that was the problem but the section.
So that's why the section of the Unite d'Habitation (below top) is so fabulous, because it lays down vertical access as just the rising box that is the lift, there is no staircase under a roof light to trudge up. The stairs are just emergency measures and the emphasis shifts from vertical to horizontal; once you are out of the lift you are once more on a street, just one higher up.
This of course enabled the notion of 'streets in the sky'.


