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Greenroads Rating System

Greenroads Rating System: Certifies sustainable transportation infrastructure and roadway projects

Maílis Carrilho
Written by Maílis Carrilho
Published Sep 1, 2026

Summary

Greenroads is a voluntary third-party rating and certification system for sustainable transportation infrastructure, especially roadways and bridges. It uses a points-based framework with required criteria and voluntary credits to assess areas such as environment and water, materials and design, construction activities, access and livability, and utilities and controls. Certification levels include Bronze, Silver, Gold, and Evergreen. Greenroads is not a law and is not fully global, but it is used in the U.S. and internationally. It is relevant for public agencies, engineers, contractors, municipalities and infrastructure investors seeking credible sustainability recognition for transport projects.

Details

Jurisdictions
  • The United States of America (USA)
Mandatory for

Greenroads is not legally mandatory.

It can become practically required where:

A transport agency specifies Greenroads.

A public procurement process references it.

A developer or concessionaire commits to certification.

A lender or investor requires sustainable infrastructure evidence.

A city or state transportation program uses it.

A contract requires a target Greenroads level.

Voluntary for

In most cases, Greenroads is voluntary and used to demonstrate transportation infrastructure sustainability.

Deep dive

4 min read
Updated Sep 2, 2026

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What’s Required

1. Use of the Greenroads Rating System

Projects are evaluated using the Greenroads Rating System, which is designed specifically for transportation infrastructure. The system is points-based and uses required criteria and voluntary credits to assess sustainability performance.

Project teams may need to document:

  • Project scope and boundaries.

  • Roadway or bridge design.

  • Environmental and water measures.

  • Materials and pavement choices.

  • Construction practices.

  • Access and livability.

  • Utility coordination.

  • Community impacts.

  • Sustainability innovation.

2. Project Requirements and voluntary credits

Earlier Greenroads materials describe 11 Project Requirements and 37 Voluntary Credits, with certification levels based on points earned. Later versions have evolved, so project teams should use the current Greenroads guidance for the applicable project.

Relevant areas include:

  • Water management.

  • Environmental protection.

  • Access and equity.

  • Community impact.

  • Construction practices.

  • Materials selection.

  • Utility coordination.

  • Long-term performance.

  • Innovation.

3. Independent review and certification

Greenroads Foundation offers project rating services including assessment and certification. Certification is a formal process requiring documentation, review, feedback, and an award decision.

Project teams should prepare:

  • Design documentation.

  • Construction documentation.

  • Materials data.

  • Calculations.

  • Environmental evidence.

  • Community engagement evidence.

  • Contractor procedures.

  • Review responses.

4. Certification levels

Greenroads certification levels include Bronze, Silver, Gold, and Evergreen, according to Greenroads materials.

Project teams should understand:

  • Required criteria.

  • Point thresholds.

  • Target certification level.

  • Assessment versus certification service.

  • Current rating system version.

  • Final award decision.

5. Transportation-specific sustainability

Greenroads is focused on transportation, unlike general building certification systems. Its rating areas are designed for roads, bridges, and transportation corridors.

This makes it relevant to:

  • Road construction.

  • Bridge construction.

  • Pavement choices.

  • Stormwater management.

  • Multimodal access.

  • Construction emissions.

  • Community disruption.

  • Materials circularity.

  • Infrastructure resilience.

Important Deadlines

Greenroads is voluntary, so there is no universal legal deadline.

Important timing points:

  • Certification timing depends on project registration, rating service, documentation, review, and award.

  • Greenroads assessment and certification services differ in documentation formality and evaluation duration.

  • Projects should use the current rating system version and applicable addenda or errata.

  • Greenroads is most useful when integrated early in transportation project planning and design.

Current Status

Greenroads is active as a sustainability rating and certification system for transportation infrastructure. Greenroads International was established in 2010 as an independent nonprofit organization and manages certification for sustainable roadway and bridge construction projects in the U.S. and internationally.

Current status:

  • Active voluntary rating system.

  • Focused on transportation infrastructure.

  • Used in the U.S. and internationally.

  • Developed and managed by Greenroads International / Greenroads Foundation.

  • Uses independent review.

  • Certification levels include Bronze, Silver, Gold and Evergreen.

  • Relevant to roads, bridges and transport corridors.

Penalties for Non-Compliance

Greenroads does not impose statutory penalties.

Possible consequences include:

1. Certification refusal

A project may fail certification if required criteria, documentation or point thresholds are not met.

2. Lower certification level

A project may receive Bronze, Silver, Gold or Evergreen at a lower level than targeted.

3. Contractual consequences

If Greenroads is required by procurement, finance, or contract, failure may create commercial consequences.

4. Reputational risk

Claims about sustainable roads or transportation infrastructure may be challenged if certification evidence is missing.

5. Performance risk

Poor materials, drainage, access, or construction practices can increase lifecycle costs, emissions, and community impacts.

Examples of Known Violations / Failure Modes

Typical failure modes include:

  • Claiming Greenroads certification before award.

  • Using an outdated rating system version.

  • Treating Greenroads as a substitute for engineering compliance.

  • Failing required project criteria.

  • Submitting incomplete materials data.

  • Weak stormwater documentation.

  • Ignoring construction-phase impacts.

  • Overstating community or access benefits.

  • Not updating documentation after design changes.

  • Confusing assessment with certification.

  • Making project-wide claims where only one segment is rated.

  • Ignoring long-term maintenance and performance implications.

Resources


Maílis Carrilho
Added by:
Maílis Carrilho
Sustainability Research Analyst
Maílis Carrilho is a Sustainability Research Analyst (Intern) at Net Zero Compare, contributing research and analysis on climate tech, carbon policies, and sustainable solutions. She supports the team in developing fact-based content and insights to help companies and readers navigate the evolving sustainability landscape.
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Added on Sep 1, 2026 by Maílis Carrilho · Updated on Sep 2, 2026