Inside, Outside, Near Lane, Far Lane, whatever...

[Carol]

Geoff:
> The central reservation is usually a flat grass section with
concrete kerbing. Crash barriers, which are standard on motorways and
 trunk A-class roads are substantial strips of corrugated steel
mounted about 3 feet off the ground on metal posts to prevent
crossover smashes in the case of  a vehicle coming off the outside
lane towards the centre.

Carol responds:
Okay, the picture is getting clearer. The "central reservation" is
what we call an island or median, with "kerb" spelled as "curb." Steve
or someone can help me out with what we call the strips of steel
mounted on posts. (I'm sure they a name, but I can't remember it.)

Geoff: 
> I viewed the central resevation and crash barriers as the filling in
the sandwich of two slices of carriageway.
> :-)

Carol:
I see. It was your own metaphor. Very nice. BTW, I have no idea what a
carriageway is, carriages having long since fallen out of use, much
less a "trunk A-class road." You are certain, monsieur, zat zis is
Eenglish you are speaking?
> 
> Carol, who would call a "ham and salad sandwich" a ham sandwich with
lettuce and tomato
> 
> Geoff:
> A little clarification is called for.
> 
> Are you suggesting that the lettuce and tomato are a side salad? I
mean a sandwich which contains ham and salad items between the slices
of bread....

Carol:
No, not a side salad. "A ham sandwich with lettuce and tomato" means
that the lettuce and tomato are inside the sandwich (unless you
specifically request them "on the side"). I'm not sure which other
salad ingredients you would put on your "ham and salad sandwich."
Onion, for example, doesn't seem to go particularly well with ham, and
cheese can be a salad ingredient, but isn't a vegetable.

Carol, wondering how she ever survived in England and grateful for the
Best Bacon Baguette at the Turk's Head Inn in Oxford, which she tried,
liked, and kept on ordering!