| Country: | TUR |
| İl yolu 34-12 | |
| Alternate Name: | O1-O2 bağlantısı |
| Established: | 1991 |
| Direction A: | West |
| Terminus A: | in Üsküdar, Istanbul |
| Direction B: | East |
| Terminus B: | in Ataşehir, Istanbul |
| Length Km: | 6.9 |
| Regions: | Marmara |
| Provinces: | Istanbul |
| Cities: | Istanbul |
Provincial road 34-12 (Turkish: İl yolu 34-12), named the O1-O2 connector (Turkish: O1-O2 bağlantısı) is a 6.9km (04.3miles) long motorway in Istanbul, Turkey. The motorway is a connector route linking the motorway O-1 (Istanbul Inner Beltway) to the motorway O-2 (Istanbul Outer Beltway), where it becomes the O-4 (Anatolian Motorway). The route is one of two motorways linking the two beltways on the Asian side of the city, the other being the Şile Motorway.
The O1-O2 connector was opened in 1991.
The O1-O2 connector begins at Anadolu Interchange in Üsküdar, where it diverges from the O-1. The two-lane motorway heads east right on the border of the Ataşehir/Üsküdar and later the Ataşehir/Ümraniye district line.