>>2032814>cost a fortuneOn the ex-Pennsy, there is an excessive amount of crossing points under Main Line, including a fair number that are now just hiking paths because nobody lives there and the road's a distant memory but the tunnel wasn't filled in ever.
But many of these are 8 feet vertical clearance or less and one lane. Maybe the FEC could do that, and sink the crossing roads instead.
>rip out grade hardware>dig a shitty one lane underpass>reinforce with basic bitch girders it doesn't collapse>half-ass some hot-mix to the edge of the property boundary at no more than 8 feet wide, no shoulder>make the municipality or town or state (depending on the crossing) deal with connecting the half-assed macadam back to the roadway, and deal with signalling car traffic 
