Not to my limited knowledge. The train had been on a long straightaway where the last known speed was 81 mph. Not clear, though, exactly where that measurement was taken, and that speed appears to be within limits for at least some of the line. The curve where the train derailed, though, is posted 30 for both freight and passenger trains. We won't know what happened till the crew is interviewed, assuming they are able to talk, and the black box examined.
On the Saturday run, though, my husband and I both noticed a lot of wheel bearing noise. Probably not even the same train, but I still feel awful we didn't mention it.