Improbable "railroad" bridge:
What is wrong with this pic (taken on the old Western Maryland between Meyersdale and Deal)? That long span couldn't possibly support a train. After abandonment DOT pulled down two bridge spans in order to remove one pier so the highway (see the guard rail?) could be widened. To complete the Great Allegheny Passage Railtrail a new curved span was dropped into place. All it needs to support is bicycles
Lew