Henry H. Kelly, 82, an authority on automotive trade, transportation and travel, died of pneumonia Wednesday at his home in Washington.

A former federal government executive, he had been a consultant since 1960 to the United Nations, the State Department, the American Automobile Manufacturers Association, the Organization of American States and the American Automobile Association.

Mr. Kelly joined the government here in 1923 as assistant cheif of the automotive division in the Commerce Department. Two years later he went to Paris as U.S. automotive trade commissioner to Europe.

He left federal service for several years and then was secretary to the Sixth International Road Congress in Washington in 1930. Later he was highway transportation specialist with the Bureau of Public Roads and a carrier safety section chief with the Interstate Commerce Commission.

During World War II, Mr. Kelly was with the Office of Defense Transportation. Later he held travel and transportation positions with the State and Commerce Departments, retiring as director of the office of international travel of Commerce in 1959.

Mr. Kelly had served with numerous U.S. delegations to international conferences in his field. He contributed many articles to trade journals.

He was a member of the Society of Automotive Engineers, the Masons and the Cosmos Club.

He is survived by his wife, Edna B. of Washington, and a son, John H. of New York City and two grandchilren.