Greenhouse Gas (GHG) Program

GHG Mitigation Measure Policy Directive

On May 19, 2022, the Transportation Commission voted to adopt Policy Directive 1610 on GHG Mitigation Measures. The Policy Directive fulfills the requirements of the GHG Planning Standard, adopted by the Commission in December 2021, to establish an ongoing administrative process and guidelines for selecting, measuring, confirming, verifying, and reporting on GHG Mitigation Measures.  

GHG Mitigation Measures are an important, but voluntary, component of the GHG Transportation Planning Standard. Policy Directive 1610 provides an additional compliance mechanism for CDOT and the state’s five MPOs to meet the GHG Reduction Levels found in the Planning Standard.  

As per the requirements of the GHG Transportation Planning Standard, agencies will model the travel impacts of their transportation plans using travel demand models, with a subsequent GHG analysis of these plans through EPA’s MOtor Vehicle Emission Simulator (MOVES). If agencies do not meet their individual Reduction Levels as required by the Planning Standard, they can  change the mix of projects in their transportation plans and/or use GHG Mitigation Measures. GHG Mitigation Measures are projects and strategies whose GHG and travel benefits cannot be accurately or easily captured and quantified in travel demand models.   

Appendix A in Policy Directive 1610 includes a list of GHG Mitigation Measures that have been reviewed, vetted, and scored by CDOT subject matter experts and formally approved by the Transportation Commission. These approved GHG Mitigation Measures are “scored”, which reflects the ability of a project to reduce GHG emissions relative to a certain metric, while providing a way to distinguish and value the location and context. One point is equivalent to one metric ton of avoided GHGs. If you would like to see the calculation methodologies for any of the GHG Mitigation Measures included in the Appendix, please email Libba Rollins  ([email protected]). Any individual or organization may nominate new GHG Mitigation Measures for review and potential approval by filling out a form on CDOT’s website here. 

GHG Transportation Planning Standard

On December 16, 2021, the Transportation Commission voted to approve CDOT's new GHG Planning Standard to reduce greenhouse gas emissions from the transportation sector, improve air quality and reduce smog, and provide more travel options. The GHG Pollution Reduction Planning Standard is one of several transportation strategies identified in the state’s Greenhouse Gas (GHG) Pollution Reduction Roadmap and is a key requirement established in the 2021 state transportation funding bill (SB260). 

The Standard focuses on transportation planning — the process for how CDOT and the state’s largest metropolitan regions select future transportation projects. Long before a transportation project is built, it is first identified in plans developed with local public input. These plans often include a decade or more of projects and thus represent a short- and medium-term vision for coming changes. Review CDOT’s current 10-year plan online here.

The GHG Pollution Standard Rule would require CDOT and the state’s five Metropolitan Planning Organizations to determine the total pollution and greenhouse gas emission increase or decrease expected from future transportation projects and take steps to ensure that greenhouse gas emission levels do not exceed set reduction amounts. This approach will also streamline the planning and delivery of innovations that have proven successful in improving quality of life and air quality, like adding sidewalks, improving downtowns for active transportation with “complete streets,” improving local and intercity transit and first-and-last-mile connectivity to transit facilities, and adding bike-shares. This policy recognizes that the transportation projects we build have an impact on how Coloradans travel and encourages choices for travelers across the state.

About the Rule

Rulemaking Process

Publication of the draft standard on Aug. 13, 2021, began a 60-day public review period. During that time, CDOT hosted public hearings in Grand Junction, Glenwood Springs, Fort Collins, Denver metropolitan area, Colorado Springs, Durango and Limon.

Using the written comments and public testimony that have been received, the Commission has decided to release a revised draft of the proposed rule revisions that reflects input from the public on October 19, 2021.

The Commission initially noticed the deadline for written public comments to be Oct. 15, 2021, by midnight. Based on written comments and public testimony that have been received, the Commission decided to extend the time period to submit written comments on the proposed rulemaking, and specifically the revised draft, until Nov. 18, 2021, by noon (MST).

To allow for public comment on the revised draft, a 10th and final public hearing was held.

Older Materials

Proposed Standard (August 13, 2021 Version)

Documentos en Español: 

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Other Materials