Short answer

Incorporate circular economy principles and evaluation metrics like CIROAD into the design and planning phases of urban road infrastructure to significantly improve sustainability performance.

Field: Sustainability
Source: Sustainability (2023)
Method: Analytic Hierarchy Process (AHP) based multicriteria evaluation model development and application.
Sample: 3 projects
Evidence: Strong effect

A new evaluation model, CIROAD, demonstrates that current urban road infrastructure projects are significantly underperforming in circular economy principles, highlighting a substantial opportunity for improvement. This sustainability research insight is drawn from a 2023 study published in Sustainability. Using Analytic hierarchy process (ahp) based multicriteria evaluation model development and application. with 3 projects, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Incorporate circular economy principles and evaluation metrics like CIROAD into the design and planning phases of urban road infrastructure to significantly improve sustainability performance.

Study

SustainabilityRecentStrong effect

CIROAD metric reveals urban road projects achieve only 21-28% circularity

Sustainability · 2023

Key Findings

01Urban road projects evaluated scored between 21% and 28% on the CIROAD circularity metric.
02Significant opportunities exist for improvement by incorporating more circular practices.
03Prioritization for improvement includes pavement design with environmental criteria, value preservation, waste management CBA, EPDs for materials, use of recycled materials, and BIM integration.

Application

Design takeaway

Incorporate circular economy principles and evaluation metrics like CIROAD into the design and planning phases of urban road infrastructure to significantly improve sustainability performance.

How to apply

Utilize the CIROAD framework or similar multicriteria evaluation tools to assess the circularity of new infrastructure designs and identify key areas for improvement before project commencement.

Project actions

01When designing, think about how materials can be reused or recycled at the end of the project's life.
02Consider using evaluation tools to measure the sustainability of your design choices.

Method & Evidence

AimTo develop and validate a multicriteria evaluation model (CIROAD) for assessing the integration of Circular Economy 4.0 principles in urban road infrastructure projects.

MethodAnalytic Hierarchy Process (AHP) based multicriteria evaluation model development and application.

ProcedureThe CIROAD model was constructed with seven general criteria and twenty-five sub-criteria. This model was then applied to evaluate three urban road infrastructure projects within the Chilean Ministry of Housing and Urbanism.

Sample3 projects

ContextUrban road infrastructure projects in Chile.

Variables

IVImplementation of circular economy principles (e.g., material selection, design strategies, waste management).

DVCircularity score (CIROAD metric).

CVProject type (urban road infrastructure), organizational context (MINVU/SERVIU).

Strengths & Limitations

Strengths

+Provides a novel, specific metric for urban road infrastructure circularity.
+Integrates principles from both Circular Economy and Industry 4.0.

Limitations

The CIROAD model is complex and requires significant data for accurate application; simplified versions might be necessary for smaller design projects.

Reliability & validity

The AHP methodology provides a structured approach to multicriteria decision-making, enhancing the reliability of the evaluation. Validity is supported by application to real-world projects, though further validation across diverse contexts would strengthen it.

Think critically

How can the CIROAD model be adapted for smaller-scale design projects or different types of infrastructure to make circularity assessment more accessible?

Design Principles

"Evaluate and integrate circular economy principles throughout the entire lifecycle of infrastructure projects, from design to deconstruction, to maximize resource efficiency and minimize environmental impact."

This research provides a concrete metric for assessing the circularity of urban road projects, enabling designers and engineers to identify specific areas for enhancement. By quantifying the current low adoption rates, it underscores the urgent need for integrating circular economy principles into the design and construction phases of infrastructure.

What This Means for Your Design

A new way to measure how 'green' or 'circular' road projects are shows that most current projects are not very circular, meaning there's lots of room to make them better for the environment.

How to use in your project

1.Use the CIROAD model's criteria to inform your design brief and set sustainability targets for your design project.
2.Apply the principles of circularity to justify your material choices and design strategies.

Add to My Project

Quick Cite

Paragraph starter

The CIROAD evaluation model highlights a critical gap in current urban road infrastructure projects, with assessed projects achieving only 21-28% circularity. This underscores the necessity for designers to proactively integrate circular economy principles, focusing on areas such as environmentally conscious pavement design, value preservation, and the use of recycled materials, to drive a more sustainable built environment.

Source

Sustainability

Circular Economy 4.0 Evaluation Model for Urban Road Infrastructure Projects, CIROAD

journal · 2023

View source

Questions About This Research

What does the research say about ciroad metric reveals urban road projects achieve only 21-28% circularity?: Incorporate circular economy principles and evaluation metrics like CIROAD into the design and planning phases of urban road infrastructure to significantly improve sustainability performance. Evidence: Sustainability (2023).
Why does "CIROAD metric reveals urban road projects achieve only 21-28% circularity" matter for design?: This research provides a concrete metric for assessing the circularity of urban road projects, enabling designers and engineers to identify specific areas for enhancement. By quantifying the current low adoption rates, it underscores the urgent need for integrating circular economy principles into the design and construction phases of infrastructure.
How can designers apply this research?: Incorporate circular economy principles and evaluation metrics like CIROAD into the design and planning phases of urban road infrastructure to significantly improve sustainability performance.
What were the main findings?: Urban road projects evaluated scored between 21% and 28% on the CIROAD circularity metric.. Significant opportunities exist for improvement by incorporating more circular practices.. Prioritization for improvement includes pavement design with environmental criteria, value preservation, waste management CBA, EPDs for materials, use of recycled materials, and BIM integration.
What research method was used?: Analytic Hierarchy Process (AHP) based multicriteria evaluation model development and application. with 3 projects.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2023 journal from Sustainability.
What should I do differently in my next project?: Utilize the CIROAD framework or similar multicriteria evaluation tools to assess the circularity of new infrastructure designs and identify key areas for improvement before project commencement.
What are the limitations?: The study focused on a specific region and organization, and the CIROAD model's application might yield different results in other contexts or with different project types.