So this is a ploy to avoid real system-wide implementation, in favor of perma-temporary platforms?
It sounds depressingly sandbaggy. Those full-high costs are hyper-inflated to such absurdity they can't be taken seriously. There's no way you can equivocate cookie-cutter platforms at a grade crossing with the highest-end construction costs of a station that has to have complex up-and-over access. Those Reading Line stations shouldn't be costing more than $10M a pop (and that's being way generous...middle-high 7-figures should do it); there's simply not enough to do with them for costs to sail as high as vertically-challenged stations like Winchester Center. Even hideously overprised Chelsea Station at a grade crossing didn't come within $20M of hitting the low end of their scale...and that one was technically a "new" infill/swap with property acquisition costs. It's doubly disingenuous that they set the spec costs for an any-platform
higher than all-new infill station with complex circulation like Pawtucket. You might as well just flash a giant billboard that says "We can't build" if these are the costs they're running with. It's not a solution, it's a scandal.
They're also skirting the law by not touching the underlying low platforms, just plunking a flimsy deck on top of precisely-measured freestanding blocks. Yes, that nets you some "almost free" years of by-the-book ADA compliance, which is good and potentially very useful if they pick their spots. But it's not very many years. The whole works starts settling and crumbling the below pavement in as little as 5-10 years, until eventually they've settled so far out of alignment that they don't meet ADA specs at all. If they
don't have a near-immediate plan for kick-starting perma-designs of full-highs within about 5 years (given the increasingly long design gestation period for station renos, that means pretty much
right now), you're eventually going to chew up enough time that you get a non-compliant station again in the end. At multiple stations at once when this first cluster of temp platforms all hit end-of-life.
It's a kick of the can. A potentially useful one if they get on it
right away about advancing perma-fixes, but since when has this agency ever done that? It means the next administration is going to have another manufactured crisis on-hand when these temp platforms all start flunking inspections at the end of their short lives.