The Adriatic Highway (Croatian: Jadranska magistrala) is a road that stretches along the eastern coast of the Adriatic Sea and is part of the European route E65. The road passes principally through Croatia, with smaller stretches through Bosnia and Herzegovina and Montenegro. It is still a two-lane road for almost its entire length, with the exception of intermittent short dual-carriageway sections near Trogir, Kaštela and Split. The dual carriageway is planned to be expanded to span Trogir and Omiš. Completion of the Adriatic Ionian motorway is proposed in order to replace the Adriatic highway as a high-performance road transport route along the Adriatic coast.
Adriatic Highway runs along the east coast of the Adriatic Sea and passes through three countries: Croatia, Bosnia and Herzegovina and Montenegro. Most of the highway is located in Croatia.
Croatian section of the highway is officially named D8 state road (Croatian: Državna cesta D8), and it runs from Slovenian border crossing via Rijeka via Senj, Zadar, Šibenik, Split, Opuzen and Dubrovnik to the border with Montenegro at Karasovići. Most of the D8 is still a two-lane road, excepting rare four-lane stretches. Total length of the road through Croatia is 643.1 kilometres (399.6 mi).