Incident records and research Guide 16
What changed in a railroad crossing's record?
A crossing's record history shows differences between dated versions of its reported information. It can help trace equipment and traffic changes, but an update date is not automatically the date work happened on the ground.
For residents, researchers and people checking a project claim.
A change event compares reported values.
A change appears when a retained version differs from the preceding version. It may reflect new conditions, a correction or a different reporting treatment.
Read both values and their dates. A change from zero to an unreported value is a change in reporting, not proof that equipment was removed.
Sources: FRA: crossing inventory reporting.
An equipment change needs a project date.
A new gate count can be evidence that the inventory now reports gates. It does not prove when they were installed, tested or placed into service.
Use the road authority's or railroad's project documents to establish construction dates. Keep the inventory update date in the citation as a separate fact.
A record leaving a publication is not proof of closure.
Check the agency's status and a dated closure document before saying a crossing closed. Changes in scope, identifiers or corrections can affect whether a record appears in a particular publication.
For an actual closure, distinguish road closure, track removal and replacement by a bridge or tunnel. Those are different outcomes.
Sources: FRA: crossing inventory reporting.
Read the earliest and latest dates actually available.
Federal archives and Atlas-retained publications can have different starting points. Do not assume that every crossing has a complete history back to 1970.
Use the dates shown for the selected crossing. A gap between versions means the available records do not describe every intervening change.
Compare a reported upgrade with its source.
An example interpretation is: the earlier record reports no gates and the later record reports gates, so the reported equipment changed between those versions. This is a reading example, not a claim about a named crossing.
To establish when an upgrade happened, add its project source and relevant date. Check what the document actually establishes: a funding award, a planned installation or completed work.
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