Frontieră – Curtici – Simeria railway rehabilitation (Corridor IV)

Contract signed on 15 February 2012 for the 41.185 km double-track section; execution ran into delays and finished around January 2016, when the new traffic-control system entered service. CFR gives the investment value as €279 million including VAT, with works running 2012–2019 (Club Feroviar, October 2024). It is not described as a final cost.

Split into subsections 2A and 2B (about 80 km with 11 stations, 30 bridges and one tunnel) and Cap Y Bârzava – Cap Y Ilteu; sections 2 and 3 together were financed with RON 9.5 billion (~€2bn), RON 6bn from the Cohesion Fund. Per CFR's August 2026 status report the section is three works contracts: 2a km 614 – Bârzava (41.91 km, RON 2,065.59 million), 2b Bârzava – Ilteu (36.04 km, RON 2,295.12 million) and 2c Ilteu – Gurasada (22.34 km, RON 2,013.47 million), current values excluding VAT. 2a and 2b started on 27 July 2017 and are due in December 2026; 2c started on 4 December 2017 and is due in December 2027. The expected opening is the end of works on 2c. The new Bârzava Nouă – Vărădia alignment (18.33 km), opened in July 2025, is a separate lot. This lot's length is the 100.29 km of the three contracts less those 18.33 km (CFR August 2026 status report); 100 km was recorded before the split. The contract values cover the whole section.

Double-track new route of subsection 2b (Bârzava – Ilteu, 36.042 km) on the left bank of the Mureș, with two Mureș bridges (500 m and 550 m), 9 other bridges, 11 culverts, the 603 m Bata tunnel and the new Lalașinț stop. CFR gives the new route Bârzava – Bata – Vărădia as 15.96 km; the lot's 18.33 km is the Vărădia – Bârzava Nouă interval (tracks I and II) accepted in 2025 per the CFR August 2026 status report. Track II opened on 17 July 2025. Cost sits in the section 2 lot, whose 2a and 2b contracts were signed on 19 May 2017.

Contract signed with the FCC–Astaldi–Convensa consortium on 31 August 2017 for 41 km of line, 17 bridges, 27 culverts, 4 overpasses, 3 underpasses and 4 stations; works started in early 2018, originally due in 2021, now expected in November 2026. CFR's August 2026 status report gives a current contract value of RON 3,445.60 million excluding VAT, against RON 2,636.52 million at award. Funded through POIM 2014–2020 (phase I) and Programul Transport 2021–2027 (phase II). The 24-month guarantee is the defects notification period. The new Ilia – Mintia alignment (5.885 km), opened in November 2025, is a separate lot. This lot's length is CFR's 40.88 km for the section less those 5.885 km; 41 km was recorded before the split. Per the CFR August 2026 status report all station tracks are open with electronic interlocking and the final acceptance is being prepared. The contract values cover the whole section.

New route between Ilia and Mintia, 5.885 km long and 1.216 km shorter than the old one, with three Mureș bridges (384 m, 435 m and 486 m; over RON 290 million together). Track I opened on 11 November 2025 and track II on 6 May 2026 (CFR August 2026 status report). The 40.88 km section contract also covers ERTMS Level 2. Cost sits in the section 3 lot.