D303 is a state road connecting A9 and A8 motorways (Kanfanar interchange

Kanfanar interchange

The Kanfanar interchange is a cloverleaf interchange west of Kanfanar, Croatia. The interchange represents the western terminus of the A8 motorway and it connects the A8 route to the A9 motorway representing major a link in the Croatian motorway system...

) to Rovinj

Rovinj

Rovinj is a city in Croatia situated on the north Adriatic Sea with a population of 13,562 . It is located on the western coast of the Istrian peninsula and is a popular tourist resort and an active fishing port...

. The road is 13.5 km 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...

, state owned company.

Traffic volume

Traffic is regularly counted and reported 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...

, operator of the road. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects A9 motorway carrying substantial tourist traffic to Rovinj

Rovinj

Rovinj is a city in Croatia situated on the north Adriatic Sea with a population of 13,562 . It is located on the western coast of the Istrian peninsula and is a popular tourist resort and an active fishing port...

, a major summer resort.

D303 traffic volume
Road	Counting site	AADT	ASDT	Notes
D303	2716 Sošići	6,741	13,187	The only published traffic counting site on D303.

Road junctions and populated areas

D303 junctions/populated areas
Type	Slip roads/Notes
	Kanfanar interchange Kanfanar interchange The Kanfanar interchange is a cloverleaf interchange west of Kanfanar, Croatia. The interchange represents the western terminus of the A8 motorway and it connects the A8 route to the A9 motorway representing major a link in the Croatian motorway system... : A9 motorway to Pula Pula Pula is the largest city in Istria County, Croatia, situated at the southern tip of the Istria peninsula, with a population of 62,080 .Like the rest of the region, it is known for its mild climate, smooth sea, and unspoiled nature. The city has a long tradition of winemaking, fishing,...  (to the south) and to Umag Umag Umag is a coastal city in Istria, Croatia.The city hosts the yearly Croatia Open ATP tennis tournament on clay courts.-Geography:It is the westernmost city of Croatia, and the municipality includes Savudrija which is westernmost point of Croatia....  (to the north) A8 to Rijeka Rijeka Rijeka is the principal seaport and the third largest city in Croatia . It is located on Kvarner Bay, an inlet of the Adriatic Sea and has a population of 128,735 inhabitants... Ž5077 to Kanfanar Kanfanar Kanfanar is a municipality in the central part of Istria, Croatia, 20 km northeast of Rovinj, on the edge of the Lim Cove, on the open limestone plain of Istria. The elevation is 281 m.Chief occupations are farming and livestock breeding... The eastern terminus of the road. Eastbound D303 traffic defaults to the Ž5077.
	D21 D21 (Croatia) D21 is a state road connecting the Kaštel border crossing and Buje, as well as A9 motorway via D510 state road. The road is long.The road provides connections to several towns and cities in central and western Istria, most notably to Grožnjan, Svetvinčenat and Pazin via roads connecting to...  to Bale.
	L50128 to Bubani
	Putini
	Rovinjsko Selo Rovinjsko Selo Rovinjsko Selo is a village in Croatia. It is connected by the D303 highway....
	Rovinj Rovinj Rovinj is a city in Croatia situated on the north Adriatic Sea with a population of 13,562 . It is located on the western coast of the Istrian peninsula and is a popular tourist resort and an active fishing port... Ž5095 to Valalta resort Ž5096 to Bale The western terminus of the road.