Bernard Gaillard, 55, the director of the office of international transportation and trade at the U.S. Department of Transportation, died of cancer July 10 at his home in Temple Hills.

Mr. Gaillard had been an executive at the Department of Transportation since 1996. Before that, he had served 25 years on the staff of the Interstate Commerce Commission.

He had been a key policy adviser to the assistant secretary for aviation and international affairs, the secretary of transportation, Congress and the White House. Since 1981, he had been a member of the Senior Executive Service.

He was born in Charleston, S.C., and graduated from South Carolina State University. He received a law degree at Emory University Law School.

He also studied at Columbia University and the Kennedy School of Government at Harvard.

He had served on the building committee of Campbell AME Church in Washington.

Survivors include his wife, Joyce Williams Gaillard of Temple Hills; two children, Lisa Perry of Brooklyn, N.Y., and Khari Gaillard of Temple Hills; four sisters, Arleen Stephens of Irvington, N.J., Eleanor Green of East Orange, N.J., Francess Joyner of Camden, N.J., and Joyce G. Jefferson of Suitland; a brother, Bobby Gaillard of Pineville, S.C.; and three grandchildren.