Otoyol 1

Otoyol 1, abbreviated as O-1 and locally referred to as The First Beltway, is a controlled access highway in Istanbul, Turkey. The O-1 serves as the inner beltway and is one of three intercontinental motorways in the city, the others being the O-2, and O-7, as well as connecting the European and Asian parts of the city via the Bosphorus Bridge.

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