Transportation Conformity


The Transportation Conformity Working Group (TCWG) is a forum to support interagency coordination to maintain transportation conformity and help improve air quality in Southern California.


Project Level Conformity

Project-Level Conformity Contact List
PM Hot-Spot Interagency Review Form Template
Caltrans Conformity Streamlining Exemption Form

Lists of PM hot spot interagency review forms, qualitative analyses and quantitative analyses


Transportation Control Measures

A Transportation Control Measure (TCM) is any measure that is specifically identified and committed to in the applicable implementation plan for the purpose of reducing emissions or concentrations of air pollutants from transportation sources by reducing vehicle use, changing traffic flow, or congestion conditions.​​​