About certain overlapping tags for ?

This list is: tag, question count, followed by excerpt.

  • 32
    Use this tag in reference to the structures and systems that sustain large portions of the population such as highways, bridges, the electrical power grid, etc.

  • 26
    Questions involving the politics of means of transport, affecting automobiles, boats, trains, planes, as well as roads, railroad tracks, etc.

  • 7
    Use for questions about political issues directly related to railroads, such as their funding, regulation, or development and promotion by a government.

  • 4
    The public-transport tag has no usage guidance, can you help us create it?


contains elements of . Roads/Highways, bridges, airports, etc., could fall into both.

contains elements of and ; for the latter, public transportation by rail.

  • In how many cases is it actually a problem to have both tags if they're both relevant? As long as there aren't other more relevant tags that can't be added because of the 5-tag limit, I don't think it's a problem to have both [transportation] and [infrastructure] tags on the same question. The railroad tag may be too specific, but I'm not sure about the [public-transport].
    – JJJ Mod
    Sep 3, 2021 at 21:17
  • 3
    Approximately 14% (864) of [united-states] tagged questions have 5 tags, I think these are mostly due to over-tagging. My "go-to" thinking is to minimize the use of tags wherever possible. It may not be a problem. I just want to reduce the potential. I would not remove one of the tags, if both were present and no other tag was needed; or add the other, if I found an unexpected question were both were appropriate.
    – Rick Smith
    Sep 3, 2021 at 22:04
  • @RickSmith Why is fewer tags better? People follow tags, so the more tags, the more people that might be able to answer the question might get pinged. Sep 24, 2021 at 0:01
  • @AzorAhai-him- yea, I thought the same thing at first. Looking at it again though, a question about trains may be tagged [railroad], [transportation] and [public-transport]. If there are three more relevant tags then one must be dropped. Keeping all these specific tags risks scattering similar question topics across different tags, thus reducing findability.
    – JJJ Mod
    Sep 24, 2021 at 2:27
  • This has been featured for over a week now with no downvotes on the question or answer. Do you think it's time to go ahead with merging or are you still reviewing some of these questions?
    – JJJ Mod
    Oct 4, 2021 at 17:03
  • @JJJ For the purpose of making [railroad] and [public-transport] synonyms of [transportation], I am OK with going ahead. There are questions that could use changes other than the two synonyms, I will revisit those by reviewing all [transportation] questions after the merge.
    – Rick Smith
    Oct 4, 2021 at 17:52
  • Okay, I've created the synonym and merged them. Shall I mark this question as [status-completed] or do you think it needs more attention from others?
    – JJJ Mod
    Oct 4, 2021 at 17:54
  • 1
    @JJJ - I think [status-completed] is fine, given that others have had a month to comment.
    – Rick Smith
    Oct 4, 2021 at 17:59

1 Answer 1


I suggest making and synonyms of .

The "common sense" solution for the infrastructure overlap is:

If an infrastructure question involves transportation elements only, use the tag.

Otherwise, use the tag.

I can see no reason to use both.

But, note that, currently, 5 questions use both and . This would conflict with not using both. Removing from those questions would resolve the conflict. (See the list.)

One question uses and : What is the capitalist answer to rail passenger transportation being non financially profitable?, and may need the tag removed.

  • "railroad" is not synonymous with "public-transport," it would be pretty easy to ask a question about freight rail that is not public whatsoever. Sep 24, 2021 at 0:02
  • 1
    @AzorAhai-him- I'm suggesting that [public-transport] is a synonym of [transportation] and that [railroad] is also a synonym of [transportation].
    – Rick Smith
    Sep 24, 2021 at 0:10
  • Hm, yeah, fair enough Sep 24, 2021 at 3:07

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