Central
State authorities are responsible for: 
Regional
Regional authorities are responsible for: 
- Systematically monitoring and analysing studies, proposing measures, preparing projects and preliminary studies to improve traffic and communal infrastructure;
 - Transport and traffic infrastructure of regional importance;
 - Construction and maintenance of county and local roads;
 - Operation of railways of regional importance, if specifically transferred by the government's decision (which has not yet taken place);
 - Maritime transportation – county lines: regulation and concessions;
 - Ports (through county port authorities).
 
 
Local
Local authorities are responsible for:
- Traffic management;
 - Operation of railways of local importance, if specifically transferred by the government's decisions (which has not yet taken place);
 - Construction and maintenance of uncategorised roads;
 - Maintenance of local roads in the area (only for large Towns and County seats Towns);
 - Maritime transportation – local lines: regulation and concessions;
 - Local public transport;
 - Taxi service – regulation and issuance of permits.
 
 
Responsible ministries/bodies
Central
Regional
- Regional authorities – counties (županije)
 - Administrative Department of Traffic and Municipal Infrastructure, Administrative Department for Regional Development, Infrastructure and Project Management
 
Local
- Local authorities – municipalities and
cities (općine i gradovi)
 
Sources:
Ministry of the Sea, Maritime
Affairs, Transport, and Infrastructure
Law on Railway (NN 94/13, 148/13, 73/17). 
Law on road traffic transportation (NN 41/19).
Law on roads (NN 84/11, 22/13, 54/13, 148/13, 92/14).
Law on Transport in Linear and Occasional Coastal Maritime Traffic (NN 33/06, 38/ 09, 87/ 09, 18/11, 80/13, 56/16).
Law on maritime domain and sea ports (NN 158/03, 100/04, 141/06, 38/09, 123/11, 56/16)
Law on railway (NN 94/13, 148/13, 73/17)
Law on Amendments to the Railway (NN 73/17)     
Law on Amendments to the Railway Safety and Interoperability Law (NN 110/15)
Law on Regulation of the Railway Services Market (NN 104/17)
Law on Regulation on Amendments to the Railway (NN 194/03)