Me. I would be most grateful for including material on the medieval superbridge at Trezzo sull'Adda. Why? Because this bridge must have been amazing as it doubled the longest span of stone bridges then (from 37 to 72). Still, the briidge is almost unknown, as nobody covers the subject. 

There is also a claim that the Etruscans build very early on stone arch bridges (earlier than both Greeks and Romans). Two of them are included in Structurae, but I am not sure whether these are still the original structures. Including the Etruscans in a comprehensive history of stone arch bridges would definitely be an almost revolutionary thing.

For the timeline, see also
 Trajan's Bridge - longest span for a 1000 years
 Ponte Santa Trinità - first elliptical arch bridge
 Steinerne Brücke in Regensburg, Germany - model for many medieval bridges to come
 Pont Saint-Bénezet - IMHO this bridge could be the first segmental arch bridge in Europe. What we need is the span-rise-ratio. Regards