D123 is a state road on island of Mljet

Mljet

Mljet is the most southerly and easterly of the larger Adriatic islands of the Dalmatia region of Croatia. The National Park includes the western part of the island, Veliko jezero, Malo jezero, Soline Bay and a sea belt 500 m wide from the most prominent cape of Mljet covering an area of...

 in Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

 connecting the main state road on the island (D120

D120 (Croatia)

D120 is the main state road on island of Mljet in Croatia connecting Mljet National Park and resorts on the island to Sobra and the ferry port in the town, from where Jadrolinija ferries sail to the mainland, docking in Prapratno and the D416 state road...

) to Sobra

Sobra

Sobra is a port village in Croatia. It is connected by the D120 highway and by ferry....

 ferry port, from where Jadrolinija

Jadrolinija

Jadrolinija is a Croatian sea shipping company. It is a state-owned company and its main mission is connecting Croatian islands to the mainland by operating regular passenger and cargo transport services...

 ferries fly to the mainland, docking in Prapratno

Prapratno

Prapratno is a port village in Croatia. It is connected by the D414 highway and by ferry....

 and the D416

D416 (Croatia)

D416 branches off to the south from the D414 near Ston towards Prapratno ferry port - providing ferry access to Sobra on island of Mljet and the D123 state road...

 state road. The road is 1.1 km (0.683510010314787 mi) long.

The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske ceste

Hrvatske ceste

Hrvatske ceste is a Croatian state-owned company pursuant to provisions of the Croatian Public Roads Act , the county and local roads are managed by county authorities, while the motorways are managed by Croatian Motorways Ltd and other concessionaires.The company is currently administered by a...

, a state-owned company.

Traffic volume

Traffic is not regularly counted on the road, however, Hrvatske ceste

Hrvatske ceste

Hrvatske ceste is a Croatian state-owned company pursuant to provisions of the Croatian Public Roads Act , the county and local roads are managed by county authorities, while the motorways are managed by Croatian Motorways Ltd and other concessionaires.The company is currently administered by a...

 report number of vehicles using Prapratno-Sobra ferry line, connecting the D123 and D416 state road

D416 (Croatia)

D416 branches off to the south from the D414 near Ston towards Prapratno ferry port - providing ferry access to Sobra on island of Mljet and the D123 state road...

. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects to a number of summer resorts.

D123 traffic volume
Road	Counting site	AADT	ASDT	Notes
D123	8311 Prapratno-Sobra	96	237	Vehicles using Prapratno-Sobra ferry line.

Road junctions and populated areas

D123 junctions/populated areas
Type	Slip roads/Notes
	Sobra Sobra Sobra is a port village in Croatia. It is connected by the D120 highway and by ferry....  ferry port – access to the mainland port of Prapratno Prapratno Prapratno is a port village in Croatia. It is connected by the D414 highway and by ferry....  (by Jadrolinija Jadrolinija Jadrolinija is a Croatian sea shipping company. It is a state-owned company and its main mission is connecting Croatian islands to the mainland by operating regular passenger and cargo transport services... ) and the D416 D416 (Croatia) D416 branches off to the south from the D414 near Ston towards Prapratno ferry port - providing ferry access to Sobra on island of Mljet and the D123 state road... . The northern terminus of the road.
	Sobra Sobra Sobra is a port village in Croatia. It is connected by the D120 highway and by ferry.... D120 D120 (Croatia) D120 is the main state road on island of Mljet in Croatia connecting Mljet National Park and resorts on the island to Sobra and the ferry port in the town, from where Jadrolinija ferries sail to the mainland, docking in Prapratno and the D416 state road...  to Pomena Pomena Pomena is a village in Croatia. It is connected by the D120 highway.... , Polače Polače Polače is a village in Croatia. It is connected by the D120 highway....  and Mljet National Park (to the west) and Saplunara Saplunara Saplunara is a village in Croatia. It is connected by the D120 highway.... (to the east). The southern terminus of the road.