If it's transport other than trains ... it goes to "buses and other ways to travel"
If it's outside our area it goes to "the wider picture".
Pedantically reading the pinned posts, "the wider picture" takes precedent, but there's a caveat on "buses" which way it's not an absolute rule - there's no "must be posted in the wider picture". In this case, I would on balance suggest that the post is of interest as a learning point in our area / a countrywide lesson to be careful as you low-load traction engines around, and had I come across the article I would probably (a) have posted and (b) done so under buses. "Is it of interest to me as a bus user in the South West?" ... "Yes".
Where perhaps something would go in the wider picture would be one of the too-familiar bus withdrawals such as
97 Castle Carrock-Brampton-Hethersgill-Crosby-on-Eden-Carlisle, all journeys withdrawn;
from
News and Star which forms a lesson in our part of the country only in terms of being yet another example of a pulled bus, rather than a significant learning point.
But this is a pedantic discussion - either place is fine for the traction engine, and perhaps significantly nobody posted about the 97 in Cumbria on either