Hyundai Rotem is the manufacturer for trains.

If you come to Korea, you can find the logo of Hyundai Rotem in metro, KTX and even in elevators.

By the way, I found the new article that Hyundai Rotem extend their business to a vehicle production facility field.

Rotem got a deal with Ford USA for supplying transportation equipment.

More detailed information you can check out the below link :

https://en.yna.co.kr/view/AEN20201109002600320