A4 Niš – Dimitrovgrad (E80)

First 3 km of the motorway, from the Trupale interchange with the A1 towards Niš. Built 1990–1992 and then paused by sanctions and the wars. The OpenStreetMap interchange Niš sever lies about 1.6 km from Trupale, so the cut at 3 km follows the published length.

Niš bypass. Serbian Wikipedia gives construction from 1997; English Wikipedia gives 1998. Published length 15 km; the drawn centreline measures 13.73 km because the cuts follow the published lengths of the neighbouring sections and the Malča interchange.

Works were completed on 30 June 2017 but the section opened only with Bancarevo – Crvena Reka on 9 November 2019. The Prosek end is placed at the Malča interchange area, about 16.7 km from Trupale.

Includes the 0.8 km Bancarevo tunnel (Subterra, Czech Republic; construction works finished 9 June 2017, fully opened 2019). Last section to open, on 9 November 2019, completing the motorway from Niš to the Bulgarian border.

Opened 13 July 2017 together with Čiflik – Staničenje. English Wikipedia also gives 2011 as the start year.

Opened 13 July 2017 together with Crvena Reka – Čiflik.

Opened in stages. The sub-section table of Serbian Wikipedia still lists a 0.6 km slope and overpass and a 1.2 km tunnel with two bridges as under construction, while its Corridor X article puts the opening of the whole section on 9 November 2019; the date recorded follows the latter.

Works were completed in November 2016 but the section could not open until its neighbours were finished. The drawn centreline measures 14.95 km, cut at the mapped Pirot-istok and Dimitrovgrad interchanges.

Tunnels built by Terna, electromechanical equipment by Elef (Italy). Dates follow the construction table of Serbian Wikipedia; its Corridor X article puts the bypass among sections opened on 9 November 2019. The drawn centreline measures 8.89 km and ends at the Gradina border interchange.