Problem:      Urban sidewalks often become uneven and hazardous due to tree root expansion, creating unsafe walking conditions and frequent maintenance issues.

This disproportionately impacts:
  • Pedestrians navigating daily routes
  • Elderly and mobility-impaired individuals
  • Cities managing costly repairs

Current systems are designed to resist natural growth rather than adapt to it, leading to repeated failure.
                     
                         Opportunity:
How might we design sidewalk systems that accommodate natural root growth while maintaining safe, stable walking surfaces?


                           Design Principles:
Inspired by cancellous bone structures, I defined principles to guide the system:

  • Porosity → supports root growth and water flow
  • Distributed Strength → reduces localized pressure points
  • Flexibility → adapts to environmental change
  • Integration → works with surrounding ecosystem

   
                       Concept Development:                              
Explored how a porous substructure could redistribute pressure from root growth rather than resist it.

Instead of a solid slab, the system:
  • Absorbs expansion
  • Allows roots to grow within a controlled network
  • Maintains a stable top walking surface
       
                                 Prototyping & Testing:                           

Using Rhino and Grasshopper, I developed parametric models to test structural behavior.

I then 3D printed iterations to evaluate:
  • Structural integrity
  • Material distribution
  • Feasibility of porous networks

Iterations helped refine the balance between strength and flexibility.
       
       

                                Final System:              
A modular sidewalk structure featuring:

  • A porous internal lattice for root accommodation
  • A stable surface layer for pedestrian use
  • Integrated pathways for water and nutrient flow
    

  
                      Impact:
  • Improves pedestrian safety and accessibility
  • Reduces long-term infrastructure maintenance
  • Supports healthier urban ecosystems
             
 Reflection:
This project shifted my approach from designing static objects to designing adaptive systems.

Next steps would include:
  • Material testing at larger scales
  • Collaboration with urban planners and engineers
  • Real-world simulation of root growth over time
               
    
                                                                                                                                                                                                                                                                                                                                                     
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