In this audio, the prominent sound is the rhythmic, metallic clatter signature to journeying across a grated bridge deck. The noise is a mixture of the wheels of a vehicle making contact with the bridge grating, creating a distinct, resonating hum that echoes in the background. Amidst this, the familiar hum of traffic can be made out - vehicles moving at different speeds, adding a layer of complexity to the soundscape. The overall audio is a symphony of urban living, capturing the essence of daily commute across bridges, and the inherently mechanical hum of city life.