D21 road (Croatia)

D21 state road
Route information
Part of
Length:	80.1 km (49.8 mi)
Major junctions
From:	Kaštel border crossing to Slovenia Slovenian G11
	A9 in Medaki, Vodnjan north and Vodnjan south interchanges D300 in Buje D44 in Ponte Porton D301 in Ponte Porton D302 near Baderna D303 near Svetvinčenat
To:	D400 in Pula
Location
Counties:	Istria
Major cities:	Pula, Vodnjan, Buje
Highway system
State roads in Croatia

Vižinada, located on D21 route

Tičan observatory near Višnjan and D21 route

Sveti Lovreč, located on D21 route

Vodnjan, located on D21 route

Pula, the southern extent of D21 route

D21 is a state road connecting the Kaštel border crossing and Buje, as well as A9 motorway via D510 state road. The road is 80.1 km (49.8 mi) long.^[1]

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 D21.

Prior to construction of the A9 motorway, D21 was the main north-south road in the western Istria, and it was heavily congested in summer due to heavy tourist traffic and the fact that it served as the main connection for regular traffic in the area, passing through many settlements. Now it serves as a parallel road to the A9 motorway, as it is linked to virtually every interchange of the motorway by connecting roads of varying length, most notably D510, D200 and Ž5002 which serve, along the D21 state road, as the main connection of the A9 motorway and Slovenian road network - to route 11 and then towards H5 expressway to Koper, Slovenia and Trieste, Italy.^[2][3]

The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske ceste, a state-owned company.^[4]

Traffic volume

Traffic is regularly counted and reported by Hrvatske ceste, operator of the road.^[5] Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects a number of summer resorts to the Croatian motorway network.

D21 traffic volume
Road	Counting site	AADT	ASDT	Notes
D21	2702 Kaštel	1,807	2,805	Adjacent to Kaštel border crossing.
	2707 Sveti Ivan	2,420	3,264	Adjacent to Ž5008 junction.
	2719 Vižinada north	1,644	2,847	Between D44 and Ž5041 junctions.
	2721 Baderna north	2,015	3,009	Adjacent to D48 junction.
	2717 Bale	2,320	2,783	Between Ž5098 and Ž5096 junctions.
	3905 Pula north	7,136	9,464	Between Ž5115 and Ž5117 junctions. The site effectively counts traffic between D21 and D400.

Major intersections

Listed settlements with no specified junctions contain intersections with non-categorized roads.
All intersections are located in Istria County, Croatia.

km	Location	Junction	Notes[6]
0	Kaštel border crossing	G11	Kaštel border crossing to Slovenia.[7] Northern terminus of the road and of the European route E751; Northbound D21 traffic defaults to Slovenian G11 road
1		D510 E751	Connection to A9 motorway Umag interchange and to Plovanija border crossing to Slovenia (via D200 state road); The D21 and the E751 north of the intersection are concurrent
3	Kaštel
5-6	Buje	D200	To Plovanija border crossing
		D300	To A9 motorway and Umag
		Ž5007	To Šterna, Oprtalj and Karojba
		Ž5008	To Grožnjan
15	Bijele Zemlje
18	Ponte Porton	D44	To Buzet
		D301	To A9 motorway Novigrad interchange and Novigrad
23	Vižinada	Ž5041	To Brnobići
26	Ferenci
31	Žužići	Ž5042	To Višnjan
34	Cvitani
38	Baderna	D48	To Pazin
		D302	To A9 motorway Baderna interchange and Poreč.
45	Medaki interchange	A9 E751	Connection to the A9 motorway (E751)
47		Ž5002	To Vrsar
52		D303	To A9 motorway and Rovinj
58		Ž5098	To Krmed and Svetvinčenat.
60	Bale	Ž5095	To Rovinj
69		A9 E751	The A9 at Vodnjan sjever (north) interchange, accessed via a short connecting road
70-72	Vodnjan
73		A9 E751	The A9 at Vodnjan jug (south) interchange, accessed via a short connecting road
75		Ž5117	To Galižana
76		Ž5115	To Fažana, Barbariga and Brijuni National Park (access by boat)[8]
77-80	Pula	D400	To A9 motorway Pula interchange, D66 state road, Pula Airport and Pula ferry port Southern terminus of the road
1.000 mi = 1.609 km; 1.000 km = 0.621 mi      Concurrency terminus •      Closed/Former •      Incomplete access •      Unopened

Sources

1. ^ "Decision on categorization of public roads as state roads, county roads and local roads" (in Croatian). Narodne novine. February 17, 2010. http://narodne-novine.nn.hr/clanci/sluzbeni/2010_02_17_410.html. 
2. ^ "Interchanges of the Y" (in English). May 15, 2010. http://www.bina-istra.com/Default.aspx?sid=1180. 
3. ^ "H5 Koper - Dragonja" (in Slovenian). May 14, 2010. http://www.dars.si/Dokumenti/Gradnja_-_nacrti_189.aspx. 
4. ^ "Public Roads Act" (in Croatian). Narodne novine. December 14, 2004. http://narodne-novine.nn.hr/clanci/sluzbeni/2004_12_180_3130.html. 
5. ^ "Traffic counting on the roadways of Croatia in 2009 - digest" (in English). Hrvatske ceste. May 1, 2010. http://www.hrvatske-ceste.hr/WEB%20-%20Legislativa/brojenje-prometa/CroDig2009.pdf. 
6. ^ "Regulation on motorway markings, chainage, interchange/exit/rest area numbers and names" (in Croatian). Narodne novine. May 6, 2003. http://narodne-novine.nn.hr/clanci/sluzbeni/305463.html. 
7. ^ "Map of border crossings and customs office areas" (in Croatian). Customs Administration of the Republic of Croatia. March 6, 2008. http://www.carina.hr/CURH/Dokumenti/Globalni/Karta_Carinarnica_RH.pdf. 
8. ^ "How to reach us" (in English). Brijuni National Park. June 8, 2010. http://www.brijuni.hr/en/Home.aspx?PageID=17. 

See also

• Highways in Croatia
• Hrvatske ceste
• BINA Istra

External links

• Brijuni National Park