Modern transport and freight distribution system all over the world are tending towards thernadoption of best practices those are reliable, timely and cost effective. Multimodal transportrnbetween road and rail, also known as combined transport, has received a large interest in recentrnyears as part of a possible solution for a sustainable and efficient transport system. Hence, thisrnstudy focuses on the model development and analyse the model validation of the potentials ofrnintegrated rail-road freight transportation of Ethiopia from Djibouti port to Addis Ababa andrnother major cities. Much of the primary data is obtained through the administration of arnquestionnaire specifically designed to gather information on the cost involved, distancedrncovered, area coverage, amount of tonnage during import and export, problems during loadingrnand unloading and time taken to deliver cargoes to consignees. The respondents that are selectedrnsystematically for this study are traffic officers of major transport companies. Secondary datarnsources were obtained from the interviews of major transport companies operation, technical andrnmarketing managers such as from Trans Ethiopia PLC, Ethiopian Railway Corporation,rnEthiopian Shipping Lines and Logistics Enterprise and from Ministry of Transport.rnThe data set are combined with the model development and validation to create the full model ofrnthe transport system used to answer the research questions; and contains the system size,rntransport demand, infrastructure and geographical data (rail network, road network, terminals,rndemand points, etc.), equipment (trucks, trains, etc.), costs data, environmental data, timernwindows, etc. The data are analyzed using Geometric Mean analysis.rnThe findings of this paper reveal that integrating rail-road for hinterland bound goods would bernpotentially save 42.67% freight costs and time of transportation than that of using unimodalrntransportation i.e. road transportation. Furthermore, the emission of greenhouse gases can bernminimized with 218.42% when freight transportation is done by road-rail integrations. Thernimplications of these findings are that integrated road and rail modes of transport for porthinterlandrnfreight distribution would make the nationâ€™s transportation system to be faster, morerncost-effective and less emission.