As far as metal tubes and carriers, I can't believe it but the MTA somehow managed to do this without too much trouble: https://www.masstransitmag.com/technolo ... ca-station
Paul Borokhov
Last RRPicArch addition – NJ Railfan.
Moderator of the NJT and California commuter forums
Last RRPicArch addition – NJ Railfan.
Moderator of the NJT and California commuter forums