Re the closeup photo of 'tram tacks' posted by George ...
If the procession was following a horse drawn hearse, this might leave tracks like those seen in a light fall of snow.
I notice that on the straight stretch of road, that the possible wheel marks are in a line as if the back wheels followed the front wheels precisely, but as the 'cart' turns the corner slightly, the back and front wheels follow a slightly different path, as can be seen by two sets of tracks.
(Apologies if someone has already pointed this out

)