Croatian A1 motorway'
... that 18.6% of the Croatian A1 motorway's route between Zagreb and Split consists of tunnels, bridges, viaducts and similar structures?
... that 18.6% of the <b id="mwCMQ"><a href="./A1_(Croatia)" id="mwCMU" rel="mw:WikiLink" title="A1 (Croatia)">Croatian A1 motorway</a>'</b>s route between <a href="./Zagreb" id="mwCMY" rel="mw:WikiLink" title="Zagreb">Zagreb</a> and <a class="mw-redirect" href="./Split_(city)" id="mwCMc" rel="mw:WikiLink" title="Split (city)">Split</a> consists of tunnels, bridges, <a href="./Viaduct" id="mwCMg" rel="mw:WikiLink" title="Viaduct">viaducts</a> and similar structures?