BLOOMINGTON, Ind. (AP) – Opponents of the Interstate 69 highway extension say highway officials used outdated air emissions data in demonstrating that part of the highway now under construction complies with the Clean Air Act.

Highway opponents say state and federal officials used 2004 vehicular emissions data for Greene County in an environmental report to show that emissions were within required limits, even though newer data from 2009 showed higher estimated emissions levels.

Attorney Mick Harrison represents the opponents in their federal lawsuit accusing officials of violating several federal laws in the design, planning and construction of the half-completed 142-mile highway.

Harrison says he plans to file a motion seeking to halt work on a 27-mile section of the Evansville-to-Indianapolis highway now being built from the Crane area to Bloomington.