Public company merges the element of market and public, and decision-making is not based exclusively on the profitability criterion. Analysis of benefits and costs should be the basis for decision-making in the public sector. Although the goals are still made by the political process. The topic is managerial decisions-making in the HAC public company with an emphasis on management decisions durring building the A1 motorway. This paper deals with the topic of assessment of the justification for the A1 motorway construction. As a result, the goals of building the A1 motorway were to connect all parts of the state, connect with the European environment, develop tourism, increase road safety and they were realized after the A1 motorway was built. Nevertheless, the goals of population growth and industrial development have not been realized by building the A1 motorway. In addition, the cost of building motorway from Bosiljevo to Split have exceeded the projected costs by 3 billion HRK, and the one-kilometer construction cost was around 50 million HRK. Revenues on the A1 Motorway in 2015, 2016 and 2017 were on average 500 million HRK lower than expected revenue. Based on the above, it can be concluded that the highway A1 did not have to be built through loans but through a public-private partnership. It is anticipated that such modality of construction would imply a realistic assessment of traffic, gradual construction, lower cost of construction, and better revenue management.