Architectural technical cross-section illustration of a diamond-shaped urban infrastructure corridor, hand-drafted aesthetic with warm sepia tones, upper half open aerial space with simple matte white oval transit pods, no glowing lines, weathered dark steel structural poles, ground level with red earth pathways lined with acacia and fig trees, lower half underground showing concrete utility tunnels and a wide freight tunnel at base, materials are rammed earth concrete dark steel and stone, warm natural light from above, technical architectural drawing quality, Tadao Ando meets East African vernacular construction, grounded material honest, no neon no glow no sci-fi, wide format