The audio begins with the distinct, distant rumble of a diesel motor, the signature sound of an approaching bus. Gradually, the sound grows louder, a clear indication of the bus making its way down the street. The noise fills the audio, providing an unmistakable auditory image of a large, powerful autobus, a symbol of urban transportation. Suddenly, the rumbling starts to fade, transitioning to a quiet idle as the bus comes to a halt. There's a brief moment of near silence, with only the gentle hum of the idling motor in the background. This pause signifies the bus's arrival at a designated stop. Following the pause, there's the distinct mechanical sound of a door opening. It's a pneumatic hiss, followed by the creak of the door unfolding. The audio gives an impression of the door staying open, welcoming passengers onboard. Soon after, the door closes with a solid thud, followed by the hiss of the pneumatic system again. The