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only pre-stressed concrete slabs can be cantilevered, Fred.
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Now that's just not true ...
Many bridges you drive over every day have cantilevered components.. I.e. outside stringer to fascia is a cantilevered component.. The wheel path is designed to be closer to the support...
However.. considering a 4 in slab there is not enough depth to install the reinforcement needed..
And an 11 in overhang is nothing.. hardy a cantilevered deck..
If you're worried increase the depth f the slab to perhaps 6-8 in prior to the overhang to allow for proper placement of reinforcement