The Twilight Zone, Season 1

Narrator:
Her name is Nan Adams. She's twenty-seven years old. Her occupation: buyer at a New York department store, at present on vacation, driving cross-country to Los Angeles, California, from Manhattan. Minor incident on Highway 11 in Pennsylvania, perhaps to be filed away under accidents you walk away from. But from this moment on, Nan Adams's companion on a trip to California will be terror; her route - fear; her destination - quite unknown.