Do you think the jurors wouldn't be able to look at the unfinished portion directly in front of them and imagine the awfulness of the crime?
There is so much that goes in to this, for me, that I'm not sure where to start. I do think they might get a feel for what the bridge was like, sure. But whether they can see to the end, where the girls were told to go down the hill, that's debatable, as I've seen video of foliage that has grown up, and across the bridge at that end.
So to access that point, where they were actually abducted, is difficult, and would have to be through the private residence at the end of that private lane that goes under the bridge.
All this brings up the question of just how astute a person is when it comes to direction, topography, distance, etc. So, from the platform gazing across the rail bridge to the abduction point, they'd walk back toward freedom bridge, get in a vehicle, drive down past the cemetery, maybe park in the cemetery, try and peer through the woods, depending on time of year, and likely see very little, possibly the bridge through the trees a half mile or so away.
So to access the crime scene where the bodies were found, they'd likely start at RL's old place, or the cemetery, and have to walk down that wooded steep embankment, and I'm not seeing that happening, though they could take an ATV or some other mode of transportation down in to there....maybe.
Or they'd go back the trail, after looking at the rail bridge, get in a vehicle, drive all the way around to the road that accesses the private drive, and arrive under the bridge, looking up at the east end where the girls were thought to have gone down the hill, then marched across that drive, then through a bottom of woods and undergrowth, across that creek, and to the CS. They'd likely not be asked to do that walk, across the creek? I highly doubt it.