D4/R7 Bratislava bypass PPP
Slovakia built the D4 motorway and R7 expressway around Bratislava, 59.0 km at EUR 1,670 million, as a public-private partnership between 2016 and 2021, the only PPP among the major road projects the Supreme Audit Office listed in its 2025 audit of road investment.
59 km, length of the d4/r7 ppp project, 2021. 1,670 EUR million, cost of the d4/r7 ppp project as listed by the audit office, 2025. Najvyลกลกรญ kontrolnรฝ รบrad Slovenskej republiky (NKร SR), Sprรกva o vรฝsledku kontroly: Investiฤnรฉ projekty v cestnej doprave (2025), retrieved 2026-10-02.
The move, and what it needed
The transport ministry procured the Bratislava bypass as one availability-payment concession covering design, construction, financing and decades of operation, so a single private partner delivered 59 km at once rather than in budget-limited sections.
Preconditions
- A ministry able to procure and supervise a EUR 1.7 billion concession
- International lenders and sponsors willing to finance it
- Budget room for decades of availability payments
Where else it has been used: The Czech D4 (cze-d4-ppp) and Latvia's ฤถekava bypass (lva-kekava-ppp) used the same model later and at smaller scale.
Limits: The figures are one row of a table on printed page 12 of the audit office's PDF, which lists the period 2016 to 2021, 59.0 km, EUR 1,670.00 million and 'PPP' as the funding source; the audit is about road investment generally and does not evaluate the PPP itself, its cost against a public alternative or its schedule against plan. The table gives no definition of the cost (construction cost, capital value or total availability payments), so the EUR 1,670 million cannot be compared with the other rows without that caveat. The opening dates of the sections are not on this page; 2021 is the end of the period the table gives. The same table shows every other major road project financed from EU or state funds, so the record documents one delivered PPP, not a programme, and this source says nothing about Slovakia's earlier PPP attempts.