I am trying to remember the title of a RB story I read years ago. I only remember vague details - something to do with a family in a future where they were the last people alive; they were travelling along a railway track ... that's all I remember. Sort of like 'The Million Year Picnic' but on Earth. Can someone help with the title?

"The Vacation" can be found in "The Machineries of Joy" and "The Stories of Ray Bradbury."

Thanks, Dandelion - of course! How could I forget "Vacation"? A nice little 'snapshot' story.