Central 

The Ministry of the Interior, Department of Transport and Infrastructure is responsible for:

• Highways;
• Urban road transport (infrastructures); and
• Airports.
  

Oversees the Icelandic Transportation Safety Board and Icelandic Coast Guard. 

Responsible ministries/bodies

Ministry of the Interior

Local

Municipal authorities are responsible for:

• Construction and maintenance ofoads and streets within the town limits;
• Public transportation; and
• Port management and maintenance.
   

Sources:

Association of Icelandic Local Authorities in, Local governments in Iceland
Ministry of the Interior