Figure 15.
The image depicts a large, cylindrical tunnel, primarily constructed from concrete, extending into the distance. Workers dressed in safety gear appear in the middle of the tunnel, walking towards the darkened end where minimal light is visible. The interior walls of the tunnel exhibit a smooth texture, with wet reflective surfaces along the ground, indicating possible water accumulation. The cylindrical shape creates a vanishing point effect, enhancing the illusion of depth within the tunnel. The perspective draws attention to the distance and scale of the construction environment.Finished section of main tunnel