This is not necessarily true. Just because we don't use as many miles of a particular transportation does not mean the economy is shrinking. Rail still makes

This is not necessarily true. Just because we don't use as many miles of a particular transportation does not mean the economy is shrinking. Rail still makes up a huge portion of cargo transportation in the United States, we just don't need the lines that were used for last mile delivery or personal transportation because that gap was better filled by automotive and aerial transportation.