Mostostal Warszawa, the Polish subsidiary of Spanish construction contractor Acciona, is building a 2km-long tunnel as part of its £450m S19 Rzeszów Południe-Babica expressway project.

To transport the tunnel lining segments, Acciona turned to Madrid-based Solintal LRD for the conversion of two Volvo A35D articulated dump trucks and one A35E.

The vehicles are more than 11 metres long, three metres wide and about four metres high, originally with a 20 cubic metre box.

The boxes have been replaced – along with hydraulic drive elements, such as hoses, hydraulic cylinders, auxiliary components and tipping mechanism – by a lightweight structure designed to leave the permissible load capacity of 28,000 kg intact and to reduce the unladen weight of each of the three truck units by almost 2,000 kg.

As the photos here show, the attachment installed on the truck is designed with a curvature for loading segments with an outer radius of 7.3 metres, 600 mm thick and a maximum width of two metres.