Sure, but there is no precedent for such regulation as long as the railroads are privately owned by the same corporations that control congress. This is yet another case of HN Utopianism.
Why would there need to be a precedent? The regulation has been in place for forty-five years. It's the law. Congress passed it. The only new aspect is that Amtrak can now request these investigations, where previously it was the sole purview of the Department of Justice, an organization famously known for not being Congress.