This is probably wrong but the picture here was always known as the Siberian Train when we were shown it many years ago.
The ladies - my grandmother Annie Louisa, aunt Ethel in middle with Uncle Charlie beside her at least, seem to have plenty of fur on! On far left is my grandfather John Olson who seems well insulated against the cold.
I do not know the other couple who do not seem to be as well wrapped up. Perhaps they were saying goodbye.