I’m not wishing to speculate on this particular incident and don’t claim to have any specific knowledge, but to give context, at this stop the only way in/out is at the north west corner, where there is a path heading to IKEA/ Retail Park (90%+ of passengers) or towards a footbridge over the parallel freight line, towards the canal (minority of passengers)
unsurprisingly, as it serves IKEA/ Smyths Toys Superstore/ Ninja Warrior / McDonalds etc its busy at weekends and there are families trying to control excited kids
Although there’s a flat route crossing the tracks at the Sheffield end of the platforms, this is the far side from the entrance/exit and i don’t think I’ve ever seen anyone use it, the flat route crossing the tracks at the Parkgate/ Meadowhall end is closest to the entrance / exit/ IKEA etc
So it’s not impossible for a passenger to get off a service from Parkgate/ Meadowhall and need to cross the tracks on the flat at the north west corner of the station, and not realise that, since their Sheffield-bound tram pulled in (and they got off, walked to the far end of the platform), a service from Sheffield towards Parkgate/ Meadowhall had pulled into the north western platform and it’s no longer safe to cross the tracks. Or even that (since stops are by request) a service is heading to Parkgate/ Meadowhall without stopping and you don’t have long to react to it bearing down on you - I say it’s not impossible because I’ve been caught out like that myself, stupidly assumed that the far line was short and it was safe to cross, unable to see because the tram is just got off obstructed my view. Stupid of me, I know, but I’ve seen others make the same mistake
someone was killed a few years ago at Woodburn Road, a station with a similar layout to IKEA, a few stops on the Sheffield side - he didn’t seem to know that there was a tram on the other tracks and proceeded to cross - as he was obstructed by the tram he’d got off, the driver of the other tram had virtually no time to break - this tram was travelling at 13mph as it wasn’t using this request stop (Woodbourn Road isn’t a busy stop) - details are here :
https://www.gov.uk/raib-reports/fatal-collision-at-woodbourn-road-sheffield
As I say I don’t know/ am not speculating on the number of potential reasons for this incident, I’m just trying to give some context to the station layout and explain that I might have been hit by a tram there myself a few years ago, expecting everyone to cross the tracks with no indication of whether there is a tram there seems like the kind of thing that was more acceptable in the early ‘90s than it would be today