OGS (electronic toll collection)

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OGS (Turkish: Otomatik Geçiş Sistemi English: Automated Transit System) was an electronic toll collection system of RFID transponder type available on toll roads and toll bridges in Turkey. The system was adopted to avoid traffic congestion at toll plazas. The successor to OGS is the HGS system of RFID tag type implemented later on at the same toll plazas. It was launched in 1998, and was first installed on the Fatih Sultan Mehmet Bridge at O-2 over Bosporus in Istanbul. The OGS was later extended to the intercity motorways O-3, O-4, O-32, O-51 and O-52 and the other toll bridge Bosphorus Bridge on O-1 over the Istanbul Strait. The system was administrated by the General Directorate of Highways (Turkish: TC Karayolları Genel Müdürlüğü, KGM). OGS was retired on March 31, 2022 and HGS is now the sole way of electronic toll collection.