The bulk update request #12100 is pending approval.
create alias freight_railcar (12) -> freight_railroad_car (0)
create implication freight_railroad_car (0) -> railroad_car (0)
create alias passenger_railcar (32) -> passenger_railroad_car (0)
create implication passenger_railroad_car (0) -> railroad_car (0)
Reason: "Railcar" is an ambiguous term that can refer to different things depending on region. "Railroad car" is unambiguous. The tags are also updated to imply a new "railroad_car" tag that covers unpowered railway rolling stock, which presently lacks a tag.