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A Grid Is Not a Tree: Toward a Reconciliation of Alexander’s and Martin’s Views of City Form

Author

Listed:
  • Ngoc Hong Nguyen

    (Faculty of Architecture, The University of Danang – University of Science and Technology, Vietnam)

  • Khaled Alawadi

    (Civil Infrastructure and Environmental Engineering, Khalifa University, UAE)

  • Sara Al Hinai

    (Civil Infrastructure and Environmental Engineering, Khalifa University, UAE)

Abstract

Christopher Alexander famously declared that “a city is not a tree,” while Leslie Martin declared that “the grid is [a] generator.” This article investigates how Alexander’s call for overlap, adaptability, and order can indeed be manifested in grid networks, as Martin claimed. Order has been measured using the entropy of street orientation, while adaptability has been denoted by the streets’ betweenness values. Through the analysis of Abu Dhabi’s neighborhoods and global urban areas, the study reveals that overlap, order, and adaptability can coexist in gridded street network. A fine-grain scale of the grid plays a critical role in supporting the quality of urban space. To foster adaptation, planning policies should focus on adaptability providing room for informal and spontaneous growth. We conclude by noting that this approach represents a reconciliation between Christopher Alexander’s views and those of Leslie Martin.

Suggested Citation

  • Ngoc Hong Nguyen & Khaled Alawadi & Sara Al Hinai, 2023. "A Grid Is Not a Tree: Toward a Reconciliation of Alexander’s and Martin’s Views of City Form," Urban Planning, Cogitatio Press, vol. 8(3), pages 172-184.
    • Handle: RePEc:cog:urbpla:v:8:y:2023:i:3:p:172-184
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    References listed on IDEAS

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    1. Boeing, Geoff, 2017. "OSMnx: A Python package to work with graph-theoretic OpenStreetMap street networks," SocArXiv fe4ra, Center for Open Science.
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    Cited by:

    1. Michael W. Mehaffy & Tigran Haas, 2023. "Introduction: Toward a “Post-Alexandrian” Agenda," Urban Planning, Cogitatio Press, vol. 8(3), pages 148-152.

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