Hreljin Viaduct
... that the parallel structures of Croatia's Hreljin Viaduct were built using different construction methods, since the original one proved cumbersome?
... that the parallel structures of <a href="./Croatia" id="mwDHA" rel="mw:WikiLink" title="Croatia">Croatia</a>'s <b id="mwDHE"><a href="./Hreljin_Viaduct" id="mwDHI" rel="mw:WikiLink" title="Hreljin Viaduct">Hreljin Viaduct</a></b> were built using different construction methods, since the original one proved cumbersome?