 Construction of the entire route was completed in 2006; further development entails new exits, new rest areas and the reconstruction of the existing motorway.The construction cost of the A3 motorway is estimated at 7 billion Croatian kuna (approximately 958.9 million euro).The A3 motorway () is a major east–west motorway in Croatia connecting the capital of the country, Zagreb, to the Slavonia region, where the motorway follows a route parallel to the Sava River and further on to Serbian and Slovenian motorway networks.