North Korea is attempting to improve the reliability of its coal freight trains, a video report from the country’s foreign news service Uriminzokkiri shows.

The footage includes interviews with several train operators and highlights new technology to reduce maintenance times and improve reliability on the DPRK’s aging rail stock.

“(There is a new) detector that we have adopted for our train. Before we had to rely on the handwork of skilled workers to check the train, which often resulted in malfunctions, which could’ve been prevented beforehand,” Lee Il Bok, a senior rail