State Road 18 (Serbia)

State Road 18, is an IB-class road in northern Serbia, connecting Zrenjanin with Romania at Kaluđerovo. It is located in Vojvodina.

Before the new road categorization regulation given in 2013, the route wore the following names: M 7.1, M 1.9 and P 126 (before 2012) / 20, A3, 114 and 112 (after 2012).

The existing route is a main road with two traffic lanes. By the valid Space Plan of Republic of Serbia the road is not planned for upgrading to motorway, and is expected to be conditioned in its current state.

Section from Vršac (Plandište) to Vršac (Straža) is a part of European route E70.