Mainly freight, as first thought of, a quarry or mine to dock as an independent line, with limited passenger services, mainly for the workers.
On the other hand these days this could easily be a preserved line, in which case the passenger traffic would have more prominence.
The sharper diamond to get two sidings to the "dockside" is from Atlas.
The green section. The line is essentially a point to point railway, but there is room to connect to get an oval, as shown.
Leave it out and both stations can be eased to a slight improvement.
Or , probably my preference, keep it but treat it as almost abandoned, the line to it *mostly* being useful as a long siding.
But still there if a bit of roundy- roundy is desired.
The green and blue points there are shown there covered, for scenic effect, but since they have no track above them that can be instantly lifted if required.
And, as usual, another 2ft of length, or even a foot, would give definite room to breath. The operator goes inside, after all!
Chris
(edited to restore photo)
A good opportunity to try your hand at scratch-built track too as you can save a bit of space with custom pointwork. Bending the 'rules' slightly by enlarging it to 6x5 would allow for a slightly easier radius in the bottom corner.
