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![Bicycles for Seoul’s public bicycle service Ttareungi are seen on a street in Yeongdeungpo District, western Seoul on Feb. 1. [YONHAP]](https://image.koreajoongangdaily.com/12107464.jpg?imageId=12107464&width=240&height=184&format=webp&format=jpg)
![Police officers monitor the area around Seongsu Station in Seongdong District, eastern Seoul, following an announcement by a group of outlaw public bicycle riders known as ″Bicycle Crash.' [YONHAP]](https://image.koreajoongangdaily.com/12290217.jpg?imageId=12290217&width=240&height=184&format=webp&format=jpg)
![A commuter taps in with Climate Card, the capital's unlimited transit pass, to enter a subway station in downtown Seoul on Jan. 28. [NEWS1]](https://image.koreajoongangdaily.com/11998557.jpg?imageId=11998557&width=240&height=184&format=webp&format=jpg)
![A man borrows a bike from Ttareungi, Seoul's public bicycle service, in Seocho District, southern Seoul, on Wednesday. According to the Seoul city government, the service was used over 100 million times since its launch in December 2015. [YONHAP]](https://image.koreajoongangdaily.com/11450986.jpg?imageId=11450986&width=240&height=184&format=webp&format=jpg)