“Morske autoceste” predstavljaju koncept nove multimodalne europske pomorske povezanosti te su još uvijek ogroman neiskorišteni potencijal pomorskog prometa u državama Europske unije, ali i Republike Hrvatske. Preusmjeravanje tokova tereta na more, povećanje prometne kohezije, smanjenje cestovnih zakrčenja preras-podjelom tereta na pomorski i željeznički promet, te možda najznačajnije, primjena ekološki prihvatljivog transporta, samo su neki od razloga promicanja ideje o “morskim autocestama”. Postizanje čistog, sigurnog i učinkovitog transportnog sustava kao alternativa kopnenog prijevoza očituje se u mnogobrojnim strateškim dokumentima Europske unije te za cilj ima uvođenje novih multimodalnih logističkih lanaca koji će pridonijeti stvaranju strukturalnih promjena u prijevozu. Također, ovaj koncept doprinosi političkim inicijativama Europske unije za europskim pomorskim prostorom bez granica te promicanju ekološki održivog transporta. Na tragu navedenog, Ecobonus je inicijativa predstavljena od strane talijanske Vlade kojoj je cilj promocija korištenja mreža linija “morskih autocesta” te preusmjeravanje teretnog kopnenog prometa na pomorski prijevoz. Stoga je cilj ovoga rada sustavno istražiti i elaborirati mogućnost primjene i implementacije Ecobonus inici-jative u Republici Hrvatskoj. Pritom nužnim se pokazalo definiranje glavnih odrednica “morskih autocesta” te primjena Ecobonus inicijative. Metodološkim instrumentarijem odnosa troškova i koristi Ecobonusa u Italiji dokazana je važnost realizacije ovakve inicijative kao i mogućnosti primjene i implementacije Ecobonus inicijative u Republici Hrvatskoj.Motorways of the sea represent the concept of the new European maritime multimodal connections and still have huge untapped potential of maritime transport in the European Union countries and in the Republic of Croatia. Diverting freight flows to the sea, increasing the cohesion of traffic, reducing road congestion by redistributing the cargo flows on the maritime and rail transport, and perhaps most importantly, implementation of the environmentally friendly transport are just some of the reasons for promoting the idea of a motorways of the sea. Achieving a clean, safe and efficient transportation system as an alternative to land transport is reflected in numerous policy documents of the European Union and generally aims to introduce new multimodal logistics chains that will contribute to the creation of structural changes in transport. Also, this concept contributes to the political initiatives of the European Union for the European maritime space without boundaries, and promotes environmentally sustainable transportation. In additional, Ecobonus initiative was launched by the Italian government and it seeks to promote the use of motorways of the sea networks and divert freight traffic from inland to maritime transportation. The aim of this paper is to systematically explore and elaborate the possibilities of the application and implementation “Ecobonus” initiative in the Republic of Croatia. It was necessary to define the major determinant of motorways of the sea and “Ecobonus” initiative. Using the methodological approach of the cost-benefit analysis of Ecobonus’s in Italy proven the importance of implementation of this initiative and possible application and implementation of “Ecobonus” initiative in the Republic of Croatia