The EPA is approving a State Implementation Plan (SIP) revision for the State of Texas to reduce some speed limits in the Dallas/Fort Worth (DFW) ozone nonattainment area. This measure reduces speed limits in a nine county area from 70 miles per hour to 65 miles per hour and from 65 miles per hour to 60 miles per hour. This measure was submitted on April 25, 2000, and EPA proposed approval on January 28, 2001. These speed limit reductions are designed to reduce nitrogen oxides in the DFW area as part of a strategy to aid the area in attaining of the National Ambient Air Quality Standards. The EPA is also making a technical correction to ensure that it is clear that the measure applies to a nine county area.