The upgrading of the DLR with heavier and more frequent trains necessitated the strengthening of many existing viaducts to accommodate the greater braking and traction loads and avoid critical substructure overload. Train traction and braking loads were shared amongst the slender piers, most of which support the deck via rubber bearings.

CI LUD^®s were installed at rail level, linking the joints between adjacent seven-span viaducts. When the increased longitudinal traction and braking load is applied to one particular viaduct, the load is transmitted and shared with the adjacent unloaded viaducts. Installation of the CI LUD^®s eliminated the need for costly strengthening of the piers and foundations and allowed the train service to continue without interruption.