It starts in Mahmutbey East intersection on the European part, where the Avrupa Otoyolu (English: Europe Motorway) O-3 links, runs through the northern outskirts of the city passing over the Bosporus Strait, and terminates at the western end of the Anadolu Otoyolu (English: Anatolia Motorway) O-4, before the toll plaza is situated. Otoyol 2 is toll-free, however A two-way toll collection practice has been implemented on the Fatih Sultan Mehmet Bridge. O-2 is connected via three feeder highways to İstanbul 1. Çevreyolu (First Beltway) O-1 and one highway to Avrupa Otoyolu (Europe Motorway). As the connecting highway of the motorways O-3 and O-4