Seymour E. Bergman, 56, a Federal Highway Administration aide, died Tuesday at Washington Adventist Hospital. He suffered from a heart ailment.

Mr. Bergsman had been chief of the technical developed branch in the program development division since last September.

Born in Port Huron, Mich., he was a graduate of the University of Michigan, Mr. Bergsman joined the staff of the Detroit department of streets traffic in 1941.

After serving in England, France and Germany with the Army Signal Corps in the World War II, Mr. Bergsman returned to the Detroit traffic department working in design, freeway-television projects, transit studies and research.

He came here in 1967 as a safety standards engineer for the National Highway Safety Bureau of the Federal Highway Administration. He was a specialist on pedestrain safety.

Mr. Bergsman was a member of the Institute of Transportation Engineers and the Society of Municipal Engineers of Detroit. He wrote a number of articles and lectured on subjects in his field.

He was on the board of directors of Congregation Har Shalom in Potomac.

He is survived by his wife, Eva, and a daughter, Joanne, of the home in Potomac; another daughter, Susan E. of Alexandria; a son, Rolfe, of Minneapolis; sister, Charlotte Bergsman, of Silver Spring, and four brothers, Eugene, of New Port Richey, Fla., Marvin, of Washington; Donald of Detroit, and Franklyn of Potomac