Bucharest Ring Motorway

A0 motorway
Map of the A0 motorway, as of September 2024
Route information
Maintained by Compania Națională de Administrate a Infrastructurii Rutiere
Length69 km (43 mi)
101 km (63 mi) planned
32 km (20 mi) under construction
Existed2023–present
Major junctions
Beltway around Bucharest
Major intersections A 1 near Ciorogârla
DN7 near Buftea (under construction)
DN1A near Buftea (under construction)
DN1 near Otopeni
A 3 near Voluntari
DN2 near Afumați
DN3 near Pantelimon (planned)
A 2 near Cernica
DN4 near Popești-Leordeni
DN5 near Jilava
DN6 near Bragadiru
Location
CountryRomania
CountiesIlfov
Highway system
A 14 A 1

The Bucharest Ring Motorway (or the Bucharest Belt Motorway, Romanian: Autostrada Centura București), termed A0, is a partially built motorway ring around the city of Bucharest, the capital of Romania. It is serving as a second, outer ring around the city, the first being the existing Bucharest Ring Road.

It is split into two major sections: the northern and southern half-rings that are each divided into multiple lots. When fully built, it will have a total length of approximately 101 kilometers and will be a motorway connection between the existing A1, A2 and A3 motorways.

As of July 2025, the southern half-ring is fully completed and operational, while on the northern half-ring traffic only one lot is fully completed together with a small portion of the adjacent one. The rest of the northern half-ring is under construction. The parts of the motorway currently in service include the section between DN1 and DN2 on the northern half-ring, while connection between A1 and A2 motorways is possible via the southern half-ring.