In this action, the EPA is approving the State Implementation Plan (SIP) revision submitted by the State of Texas for the purpose of establishing an Employee Commute Options (ECO) program (also known as the Employer Trip Reduction (ETR) program). Pursuant to Section 182(d)(1)(B) of the Clean Air Act (CAA), as amended in 1990, the SIP was submitted by Texas to satisfy the statutory mandate that an ETR Program be established for employers with 100 or more employees, such that compliance plans developed by such employers are designed to convincingly demonstrate an increase in the average passenger occupancy (APO) of their employees who commute to work during the peak period, by no less than 25 percent above the average vehicle occupancy (AVO) of the nonattainment area.