As of 2019, these units are not in operation due to a decision by the owner not to retrofit them with positive train control (PTC). Traffic on most Class I railroad main lines were required to be equipped with PTC by 2019 in accordance with the Rail Safety Improvement Act of 2008.
By 2019, these units were not in operation due to the owner's decision not to install positive train control (PTC). Most Class I railroad main lines had to be equipped with PTC by that year as per the Rail Safety Improvement Act of 2008.