In an ideal world the passenger train holds the main and the other trains take siding of course.
Ho trains passing siding.
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Model trains train sets ho train sets.
That is or was prototypical by the way.
The ordinary passing sidings are spaced 50mm a smidge under two inches.
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In this case perhaps the op should be considering a single ended passing siding so the train being passed has to back out.
On my model railroad hoj 1 80 scale but slightly narrower than american ho i have some hidden tracks spaced 45mm 1 3 4 and a couple of those maybe in the same prefecture second tracks built later on a more favorable alignment.
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Make an oval loop with a passing siding somewhat as shown above.
Kato ho unitrack 3 112 hv2 passing siding track set with no.
Marklin digital freight train starter set w passing siding mar29322.