Autoput A 3
Serbian: Autoput A3 Serbian Cyrillic: Аутопут А3
Route information
Part of E70
Maintained by JP "Putevi Srbije"
Length	92.5 km (57.5 mi)
Major junctions
From	A3 E70 at Batrovci border with Croatia
Major intersections	21 A8 at Ruma
To	A1 E75 (Belgrade bypass) at Dobanovci interchange
Location
Country	Serbia
Major cities	Sremska Mitrovica, Ruma, Belgrade
Highway system
Roads in Serbia Motorways
← A2 → A4

The A3 motorway (Serbian: Аутопут А3, romanized: Autoput A3) is a motorway in Serbia which spans approximately 92 kilometers (57 mi) and is part of the European route E70 through Serbia. It crosses the Syrmia region from east to west, starting at Belgrade and ending at the border crossing with Croatia.

The A3 motorway begins near Šid, at the Batrovci border crossing with Croatia, and runs westward across the Syrmia region, near Sremska Mitrovica and Ruma. At the Dobanovci interchange near the outskirts of Belgrade, A3 meets the Belgrade bypass. East od Dobanovci, the A3 continues through Belgrade as the Belgrade city motorway (Serbian: Аутопут кроз Београд), a 29 km (18 mi) long urban highway which ends at Bubanj Potok interchange where it meets the A1.

The main toll stations of the A3 are located at Batrovci near Šid and Šimanovci near Dobanovci. The Belgrade city motorway section between Šimanovci and Bubanj Potok interchanges is toll-free, serving as one of main city arteries. It includes the exit to Nikola Tesla Airport, located just south of the A3.

The A3 motorway is part of the old Belgrade-Zagreb motorway, known as Brotherhood and Unity Highway which was built after World War II, by young volunteers, and opened to traffic in 1950, first as a single carriageway.^[1] The second carriageway from Belgrade to Sremska Mitrovica was completed in 1977, while the section from Sremska Mitrovica to Šid was opened to traffic in 1987.^{[citation needed]}

Nr		km	Name	Route	Places	Note
1		2	Batrovci		Batrovci	Accessible to eastbound traffic only.
2		8	Adaševci	121	Adaševci, Šid
3		22	Kuzmin	20 120	Kuzmin, Bijeljina (Bosnia and Herzegovina)	Planned to be upgraded into interchange.
4		44	Sremska Mitrovica	120 19	Sremska Mitrovica
5		58	Ruma	A8	Ruma, Šabac
6		69	Pećinci	120	Pećinci
7		84	Šimanovci	318	Šimanovci
8		92	Dobanovci	319	Dobanovci, Ugrinovci, Batajnica
9		94	Dobanovci / Beograd	A1 / E75	Belgrade, Novi Sad, Čačak, Niš
Belgrade city motorway (undesignated)
10		97	Aerodrom		Belgrade Nikola Tesla Airport, Surčin
11		104	Zmaj	100	Zemun, New Belgrade
12		106	Nacional		New Belgrade
13		107	Tošin bunar		New Belgrade, Tošin Bunar
14		108	Geneks		New Belgrade
15		109	Arena		New Belgrade
16		110	Sava Centar		New Belgrade
17		112	Mostar		Savski Venac
18		113	Hitna pomoć		Savski Venac
19		114	Autokomanda		Voždovac, Vračar
20		115	Dušanovac		Voždovac, Dušanovac
21		116	Medaković		Voždovac, Zvezdara, Medaković
22		117	Konjarnik		Voždovac, Zvezdara, Konjarnik
23		118	Lasta		Zvezdara
24		125	Bubanj Potok	A1 / E75 154	Belgrade, Novi Sad, Čačak, Niš	In construction.

• Transport in Serbia
• National Road (M)1

• Regulation of State Roads