Motorways in Serbia are called auto-put (Serbian Cyrillic: ауто-пут), a name which simply means car-road.
Motorways in Serbia have three lanes in each direction (including hard shoulder), signs are white-on-green, and the normal speed limit is 130 km/h (81 mph) (since June 2018).
The route passes Obrenovac, Čačak, Požega, Užice and ends at Kotroman (at the border with Bosnia and Herzegovina i.e. Republica Srpska), i.e. Arilje, Ivanjica and ends at Boljare (at the border with Montenegro).
A3 is runs from Batrovci border crossing with Croatia, passing Sremska Mitrovica and Ruma and ends at Dobanovci interchange near Belgrade.
The route starts at the interchange near Ruma, passes Hrtkovci and ends near Šabac.