Croatian Motorways has launched its action plan to promote the market penetration of renewable energy sources (RES), according to which Croatia should double the share of electricity produced from RES by 2010. This imposes an obligation to build environmentally friendly solutions that are already in operation throughout Europe and provide significant amounts of electricity without adverse environmental impacts. In accordance with the provisions of the Ordinance on the Use of Renewable Energy Sources and Cogeneration (Official Gazette 67/07.), and through administrative procedures with the Ministry of Economy, Labor and Entrepreneurship, Croatian Motorways d.o.o. has submitted an application for an electricity permit for the construction of a plant for the production of electricity from renewable sources. The paper presents techno-economic indicators and spatial planning data for the possible construction of a solar power plant at the location of a motorway junction. The analysis of the justification for the construction is based on a reliable assessment of the natural solar potential determined by measuring meteorological stations that register hours of solar radiation. A conceptual design has been developed for a specific spatial intervention, with which the procedure for obtaining a location permit is initiated.