The sign says “QUEUE FOR TAXI”.
I wonder whether it means “[This is the] queue for [getting a] taxi” or “[Please ] queue [here] for [a] taxi”.
In one case, ‘queue’ is a noun, and in the other case, ‘queue’ is a verb. Actually, I think ‘queue’ is probably a verb.
Not that it really matters.
It only matters if the sign is trying to say, “[This is the] queue for [the] taxis [themselves]” because then it would be a singular/plural error.
The sign should just say “taxi queue” like most of them do.
In the US, we don’t really use the word ‘queue’. Which is fine with me, since as far as I can tell, ‘queueing’ is pretty much the only English word that has five consecutive vowels (HT XKCD).
In other news, ‘strengthlessnesses’ is a plausible hypothetical word with surprisingly few vowels, all of them ‘e’.
On a related note: at some point, Gallup chairman Dr. Donald O. Clifton apparently decided to name his awesome analysis tool The Clifton Strengthsfinder, ensuring it would be unpronounceable even to native speakers of English and completely inconceivable to anyone else. I mean, ‘strengths’ is bad enough, but to then follow it up with a word starting with ‘f’? What was he thinking? I guess he never taught a small child how to read.