Concrete columns under Dongbu Expressway, Cheongdamgyo 2 and Bongeungyo bridges with a distant view of Apartments by Han river, South Korea

seoul samseongdong gangnamgu bridges han river hanriver river sunset bridge skyline urban traffic cars industrial development concrete columns structure riverside dramatic driving traffic jam elevated view city twilight dusk apartments dongbu expressway underneath under downtown cheongdamgyo bongeungyo cheongdam transportation infrastructure south korea connection interconnections junction intersection road crossroads bifurcation huge people walk