No - that would make the sentence.

I agree that common fractions look like singular 'mile' but the unit is "a quarter-mile" or "a quarter of a mile", "a half of a mile".

I would always say a decimal as plural - as thar does.
One point one miles.
Two point five miles.
Zero point three miles.

However, the question was not about the singular or plural, it was about the POSITION of the word "miles".

Mohammad Reza.s wrote:
Hi
Is it correct to use "miles" before "one" in the following sentence? If yes, why?
Prepare for a left turn in point one miles.


No - that would make the sentence.
Prepare for a left turn in point miles one.

What is the meaning of the sentence in boldface?

Thanks.