 The A4/M7 motorway route follows a radius horizontal curve and a radius vertical convex curve at the site of the bridge, intersecting the watercourse at an angle of 75 degrees.The bridge consists of dual structures, one for each of the motorway carriageways, executed as composite, continuous structures.Each of the structures comprises two × box steel girders made composite with deck slab of variable depth ( at mid-span), concreted in situ.