Hexagon City: Pioneering Sustainable Urban Architecture
Revolutionizing urban living with sustainable, low-tech design for energy, water, and shade in extreme environments like the Sahara.
Hexagon City redefines sustainable urban architecture by leveraging locally available resources, optimizing land use, and adopting low-tech solutions to create durable and environmentally friendly energy, water, shade, and cooling systems. This groundbreaking project, envisioned by Piet Scholten, was a People's Choice Award entry in the Extreme Habitat Challenge (EHC) - Sahara.
The global overpopulation crisis demands solutions that extend beyond traditional cityscapes. Hexagon City rises to this challenge by envisioning a future-ready urban hub in the harsh Sahara Desert, Mauritania. The city is planned as a transit hub for the proposed Hyperloop connecting New York to Mumbai. Designed to support a nomadic yet rooted lifestyle, Hexagon City accommodates up to 100,000 inhabitants in an eco-conscious environment.

Key Features of Hexagon City
1. Low-Tech Sustainability
The city relies on low-tech solutions to minimize carbon emissions while maximizing durability and accessibility. These innovations include:
- Providing Shade: Inspired by urban grids from cities like Paris and Barcelona, Hexagon City uses geometric urban planning to optimize shade and reduce heat exposure.
- Ventilation for Cooling: Solar chimneys and natural airflow systems provide sustainable cooling solutions.
- Water Resources: Water scarcity in the Sahara is tackled through condensation systems that generate water from the air.
- Material Usage: Rammed earth, a locally available resource, keeps construction eco-friendly and thermally efficient.

2. Morphology and Design
Hexagon City’s unique hexagonal structure is a marvel of sustainable urban design. The hexagons provide optimal shade and flexibility for expansion. Inspired by nature and existing metropolises, the city combines efficiency with aesthetic appeal. Blocks are strategically aligned to ensure minimal land waste while promoting diverse functionality within each hexagon.

3. Urban Design and Expansion
The modular design of Hexagon City allows for seamless horizontal and vertical expansion. Public transport systems are integrated into the city’s fabric, with Hyperloop stations serving as key transit hubs. Dedicated blocks for agriculture, or "food domes," create a self-sustaining ecosystem, reducing reliance on external food sources and minimizing transportation emissions.
4. Low-Tech Solutions
Innovations like solar chimneys and water-generating towers highlight the core ethos of Hexagon City: sustainability through simplicity. These towers provide ventilation and water collection, making life comfortable even in the extreme desert climate.

Living in Hexagon City
Hexagon City offers a new way of living where nature’s resources are harnessed to meet everyday needs. Every apartment, villa, and public space is equipped with natural cooling, shade, and water systems. This innovative approach creates a harmonious balance between comfort and ecological responsibility.

Saharan Street Life
The cityscape blends Eastern and Western architectural styles with low-tech systems to create peaceful and practical urban environments. Semi-slow traffic lanes ensure a serene atmosphere, while green spaces and agricultural zones enrich urban life.
Hexagon City is a blueprint for sustainable urban architecture in extreme environments. By integrating low-tech solutions and leveraging natural resources, the city sets a benchmark for future urban planning. Piet Scholten’s visionary project not only addresses the challenges of overpopulation and climate change but also reimagines how cities can function as self-sustaining ecosystems.
Discover how Hexagon City is shaping the future of sustainable architecture and creating a legacy of resilience and innovation in urban design.


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