The potential benefits of using the bridge form of precast prestressed

beams supporting in-situ concrete top slab are:

(i) For bridges built on top of rivers and carriageway, this bridge form

provides the working platform by the precast beams so that

erection of falsework is not required.

(ii) This bridge form generally does not require any transverse beams

or diaphragms (except at the location of bridge supports), leading

to reduction of construction time and cost.

(iii) It creates the potential for simultaneous construction with several

spans.

May be need to optimization or feasibility study.