i'm not sure why i don't know it, but at least answer
what's a service area
Umm, to me a service area is a resting place seen at the side of motorways, but I presume that isn't what you're referring to? In what context?
the service area where the Fire in the Hole accident happened
Ah, I see. The "service area" mentioned is the phrasing from the original newspaper report, I'm guessing that it's referring to a transfer track.
but what's the use? the article, i still don't get the point
It'll just be for maintenance of the train, the "service area" will be a workshop where they work on it.
ok. it's unofrtunate some employees couldn't see some people on a coaster