From portland traveling north on 295. the fence is on one side or another of the median. Not a barrier fence, not a safety fence.
I try to stay away from ‘northern Mass.’
I remember seeing construction the last time I went South.
My thought at the time was to prevent ‘cross-over’ accidents. We’ve had several of them in the last few years in the stretch form Portland to the Brunswick/route 1 off ramp.