37385 is having its passage slightly facilitated by following a snowplough/gritter, no doubt welcomed by the driver. He was presumably also relieved that he was on a working towards Uppermill rather than down the hill to Greenfield.
Contrast this view with another rear view of the same vehicle taken on its first day of service, just a few photos later in the same gallery.
NIKON CORPORATION NIKON D700, f/5 @ 50 mm, 1/250, ISO 4000, No Flash