For decades, Americans all over the country have taken rides in trains pulled by a legend and perhaps didn’t even know it.

The PTC (Positive Train Control) system on Union Pacific Big Boy 4014, the world’s largest operating steam locomotive, has been upgraded with a self-contained technology, which means the massive ...

After five years of restoration, one of the largest locomotives to ever ride the rails, Big Boy N0. 4014 is back on the tracks. ... replaced by more modern diesel engines.

Australia’s largest rail freight operator, Aurizon, will develop and test a 1.8MWh battery-electric tender (BET) to power a standard diesel-electric locomotive in a hybrid diesel-battery configuration ...

Senior Communications Manager for Union Pacific Mike Jaixen said in the late 50s, diesel locomotives became more common, and big boys started to retire. No. 4014 took its last trip in December ...