Ozone Season Free Transit Grant Program


Starting August 1 2022, through the end of the month, RTD and other local transit agencies across Colorado, via the Colorado Association of Transit Agencies (CASTA), are offering free public transit services to all riders. Funded by SB22-180 Ozone Season Transit Grant program, The Zero Fare for Better Air initiative is being administered by the Colorado Energy Office (CEO), and is part of the state’s broader effort to improve air quality, reduce greenhouse gas emissions, and save Coloradans money on transportation.

Transit agencies participating in the Zero Fare for Better Air program through CASTA include: Archuleta County Mountain Express, Bent County Golden Age, Bent County Transit, City of La Junta Transit, Greeley Evans Transit (City of Greeley), Mountain Metropolitan Transit (City of Colorado Springs), Northeastern Colorado Association of Local Governments (NECALG)/Prairie Express, Prowers Area Transit Agency, Pueblo Transit, San Miguel Authority for Regional Transportation, and Southern Colorado Community Action Agency.

See an up-to-date list of grantees participating in the Zero Fare for Better Air initiative via CASTA here, and a map of all transit agencies offering free fares in August here.

SB22-180 created the Ozone Season Transit Grant Program to provide grants to the Regional Transportation District (RTD) and transit associations in order to provide free transit services for at least 30 days during ozone season. The program is designed to support the state’s transit agencies to rebuild transit ridership, and reduce driving during ozone season. Ground level ozone poses health risks to all Coloradans, particularly to vulnerable populations including the elderly, young children, and people with asthma or other respiratory diseases. Reducing vehicle traffic by encouraging the use of public transit is one key strategy to help reduce ozone-forming emissions and ground level ozone during the summer months. Transit ridership during the COVID-19 pandemic fell nationwide, and while vehicle traffic has returned as COVID cases have declined, transit ridership has yet to return to its pre-pandemic levels. Encouraging more people to ride transit is one essential strategy to achieve reductions in greenhouse gas emissions and air pollution. 


Applications for the 2022 Ozone Season Transit Grant Program are closed. Applications for the 2023 season will be available at a later date.


2022 Application Dates


Action Date

Release of RFA

June 6, 2022

Mandatory pre-bid conference (virtual)

June 13, 2022; 12-1pm MT

Written questions due

June 14, 2022; by 5pm MT

Answers to questions posted on website (estimated)

June 16, 2022

Deadline to submit Applications

July 7, 2022; by 5pm MT

Anticipated Notice of Award Decisions

On a rolling basis by July 14, 2022


Program Policies and Requests for Application

Summit Stage bus