Transportation Control Measure (TCM)

Any measure that is specifically identified committed to in the applicable SIP that is either one of the types listed in section 108 of the CAA or any other measure for the purpose of reducing emissions or concentrations of air pollutants from transportation sources by reducing vehicle use or changing traffic flow or congestion conditions. Notwithstanding the above, vehicle technology-based, fuel-based, and maintenance-based measures that control the emissions from vehicles under fixed traffic conditions are not TCMs.