Bridget Ann Serchak, a public affairs officer with the National Transportation Safety Board, on Wednesday said seven investigators with the agency were to arrive at the site this week. Each will have different responsibilities. It is likely that the team will stay in the area through Monday, collecting data and documenting various aspects of the accident, she said.

The investigators will work with the Oklahoma Turnpike Authority and highway engineers looking at roadway design plans, profiles and accident statistics; will document the tractor-trailer and some of the passenger vehicles involved; will examine other vehicles from the accident; will examine human performance; and will document company and driver records.

Serchak said investigators want to interview Creed, but that those plans have not been confirmed. Creed was driving a truck for Kansas City, Kan.-based Associated Wholesale Grocers.

Missouri authorities have said Creed had a clean driving record, and that his commercial driver license was renewed in April. He initially obtained the license in 1991.

The Associated Press contributed to this report.

Patrol: Brakes OK

The Oklahoma Highway Patrol on Tuesday said it found no problems with the brakes on the tractor-trailer involved in the multiple-vehicle accident. Capt. Craig Medcalf, who leads the patrol’s motor carrier division, said the assessment was based on an examination of the rig’s brake pads, which he said appeared to be in good condition. Medcalf said the tractor was a 2009 model and the trailer was a 2008 model.