EPA is taking direct final action to approve a State Implementation Plan (SIP) revision submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), Bureau of Environment, Air Pollution Control Division (APCD), on July 12, 2012. This revision consists of updates to transportation conformity criteria and procedures related to interagency consultation and enforceability of certain transportation-related control measures and mitigation measures. The intended effect is to update the transportation conformity criteria and procedures in the Tennessee SIP. This action is being taken pursuant to section 110 of the Clean Air Act (CAA or Act).