Dr. Sander Ros, 78, and his wife, Elisabeth A. Ros, 62, formerly residents of Reston, were killed Dec. 23 in an automobile accident in Opelika, Ala.

They were on the way to their new home in Walnut Creek, Calif., when the accident occurred.

A spokesman at the U.S. Geological Survey's National Center in Reston, where Mrs. Ros was a scientific and technical illustrator, said their car ran off the highway, struck an embankment and overturned into a fence. He said Mrs. Ros was driving and the couple had been traveling all night after leaving Reston.

Mrs. Ros, who had joined the Geological Survey here in 1966, was beingreassigned from the Reston center to the USGS technical reports unit at the Menlo Park, Calif., field center.

Dr. Ros, who was a lawyer in Hungary at one time, had worked in the circulation section of the Woodrow Wilson Branch of the Fairfax County Public Library system from 1966 until retiring in 1973.

Both Dr. and Mrs. Ros were born in Hungary. She had attended the Commercial Academy, Technical College, in Budapest and had worked for a geological institute of the Hungarian government.

They came to this country following the Hungarian uprising in 1956 and lived in New York, where Dr. Ros did research work for a law firm and Mrs. Ros was employed as a technical illustrator by Rand McNally.

As a cartographic technician with the Geological Survey, Mrs. Ros prepared technical illustrations for numerous geological publications of USGS and other national and international earth science journals. She also prepared slides to illustrate papers given at regional, national and international meetings of scientific societies.

Survivors include two daughters, Eva Borocz, of Danville, Calif., and Christine Cseko, of Purchase, N.Y., and two grandchildren.