re: #21 Justanotherhuman

“Positive train control” system is required by federal law to be installed on all passenger and major freight railroads by the end of 2015.

If that had been done already, this crash would more than likely not have happened.

Amtrak says it will be done before the deadline.

According to CNN, it had been installed on that stretch of track but was not yet operational as it had not been sufficiently tested. Apparently one of the delays in installing has to do with a lack of radio bandwidth for the system. Can anyone help on why that would be the case?