Reducing Greenhouse Gas Emissions from Transportation

The Air Pollution Control Division will be proposing a transportation rule package to reduce greenhouse gas (GHG) emissions and other air pollutants from transportation in Colorado. This rule is part of an ambitious effort to address climate change and meet the state’s science-based climate targets of 26% by 2025, 50% by 2030% and 90% by 2050 from 2005 levels, outlined in the state
Greenhouse Gas Pollution Reduction Roadmap.


Stakeholder Engagement Process

State staff would like to thank everyone (over 1,200 people) who participated in the stakeholder process since January 2021. The Division hosted five large public listening sessions (offered in English and Spanish), six listening sessions on the Employee Traffic Reduction Program, two workshops on equity considerations, and numerous small meetings with chambers of commerce, environmental groups, local governments, and community members.

Find out how to participate in the rulemaking process at the Air Quality Control Commission website.

To stay updated on the upcoming rulemaking process, please make sure you're signed up for Air Quality Control Commission (AQCC) notices by emailing your contact information to Subject: Email Distribution List.


Descubra cómo participar en el proceso de elaboración de normas en el sitio web de la Comisión de Control de Calidad del Aire.

Para mantenerse actualizado sobre el próximo proceso de elaboración de reglas, asegúrese de estar suscrito a los avisos de la Comisión de Control de Calidad del Aire (AQCC) enviando un correo electrónico con su información de contacto a Asunto: Email Distribution List

Main Rule Components

Employee Traffic Reduction Program (ETRP)

(What is ETRP? - video presentation) (Fact Sheet(Información General)

The Air Pollution Control Division (Division) is proposing the Employee Traffic Reduction Program (ETRP) to the Air Quality Control Commission (AQCC0 as a potential greenhouse gas reduction strategy for employers within Colorado's Ozone Nonattainment Area with 100 or more employees at one worksite. The Division's proposal builds off of work done by the Regional Air Quality Council's to develop an ETRP framework and will provide multiple benefits beyond reducing GHGs.

Vehicle Emission Inspection Program 

(Fact Sheet) (Información General)

The Division is also proposing updates to Colorado’s vehicle inspection program to make it more effective in protecting air quality in the state. More information on the Vehicle Emission Inspection Program is available here.

Greenhouse Gas Pollution Standard

(CDOT webpage) (Fact Sheet) (Información General)

One of the key recommendations stemming from the Governor’s Greenhouse Gas (GHG) Roadmap is the adoption of a new GHG Pollution Standard for the transportation sector, which would set GHG budgets for transportation plans. This will help reduce GHG emissions resulting from vehicle travel across the state. This rule component is still under development and anticipated to be release in the first part of June.

Rulemaking Process

  • May 20-21, 2021: Request for Rulemaking Hearing before the Air Quality Control Commission
  • TBD: Request for Hearing for Greenhouse Gas Pollution Standard rule component (check back for more details soon)

You can register for these meetings and find information on participating in the rulemaking process at the AQCC website.