Transportation Conformity requirements for highway and transit projects are defined by U.S. Environmental Protection Agency (EPA) regulations, US EPA and US DOT (FHWA) guidance, and local consultation procedures set up by Metropolitan Planning Organizations and Air Pollution Control Districts to achieve and maintain Federal air quality standards.
Regional analysis addresses the effect of all regionally significant projects in a nonattainment area. The regional analysis considers the Design Concept (what type of project it is) and scope (how long, capacity, etc.) of all projects to be implemented by various analysis years. Regional conformity must be determined not less often than every 4 years by a MPO with a nonattainment or maintenance area, and usually is analyzed more often as Regional Transportation Plan and Federal Transportation Improvement Program amendments happen.
On July 18, 2024, the Kern COG Board of Directors adopted the 2025 Federal Transportation Improvement Program and 2024 Air Quality Conformity Analysis. State and Federal approval is required.
| 2024 Conformity Analysis | 2022 RTP | 2025 FTIP | July 18, 2024 |
| 2022 Conformity Analysis | 2022 RTP | 2023 FTIP | December 16, 2022 |
| 2021 Conformity Analysis | 2018 RTP | 2021 FTIP | August 13, 2021 |
| 2020 Conformity Analysis | 2018 RTP Amendment 1 | 2021 FTIP | April 16, 2021 |
| 2015 Ozone Conformity Analysis | 2018 RTP | 2019 FTIP Amendment 2 | May 9, 2019 |
| 2018 Conformity Analysis | 2018 RTP | 2019 FTIP | December 3, 2018 |
| 2017 Conformity Analysis | 2014 RTP Amendment 2 | 2017 FTIP Amendment 9 | October 19, 2017 |
| 2016 Conformity Analysis | 2014 RTP Amendment 1 | 2017 FTIP | September 15, 2016 |
| 2015 Conformity Analysis | 2014 RTP | 2015 FTIP Amendment 12 | August 28, 2015 |
| 2014 Conformity Analysis | 2014 RTP | 2015 FTIP | June 19, 2014 |
| 2013 Conformity Analysis | 2011 RTP Amendment 5 | 2013 FTIP Amendment 9 | November 4, 2013 |
| 2013 Conformity Analysis | 2011 RTP Amendment 4 | 2013 FTIP Amendment 4 | March 25, 2013 |
| 2013 Conformity Analysis | 2011 RTP Amendment 3 | 2013 FTIP | July 19, 2012 |
| 2011 Conformity Analysis | 2011 RTP Amendment 2 | 2011 FTIP Amendment 10 | April 19, 2012 |
| 2011 Conformity Analysis | 2011 RTP Amendment 1 | 2011 FTIP Amendment 7 | September 15, 2011 |
| 2011 Conformity Analysis | 2011 RTP Amendment 1 | 2011 FTIP Amendment 4 | May 19, 2011 |
| 2011 Conformity Analysis | 2011 RTP | 2011 FTIP | July 15, 2010 |
| 2009 Conformity Analysis | 2007 RTP Amendment 2 | 2009 FTIP Amendment 8 | September 18, 2009 |
| 2009 Conformity Analysis | 2007 RTP Amendment 1 | 2009 FTIP Amendment 2 | January 15, 2009 |
| 2007 Conformity Analysis | 2007 RTP | 2007 FTIP Amendment 6 | October 18, 2007 |
| 2007 Conformity Analysis | 2007 RTP | 2007 FTIP Amendment 3 | May 17, 2007 |
| 2006 Conformity Analysis | 2004 RTP | 2006 FTIP | July 20, 2006 |
| 2006 Conformity Analysis | 2004 RTP | 2004 FTIP | February 24, 2006 |
| 2005 Conformity Analysis | 2004 RTP | 2004 FTIP | April 21, 2005 |
| 2004 Conformity Analysis | 2004 RTP | 2004 FTIP | August 19, 2004 |
| Draft 2002 Conformity Analysis | 2000 RTP | 2002 FTIP | May 2002 |