Railroad intermodal traffic –- especially the movement of containers atop flat cars — is sizzling.

Responding to the growing demand, Union Pacific has ordered almost 10,000 new 53-foot containers this year, according to the Journal of Commerce. Additionally, reports the Journal of Commerce, UP has ordered 5,600 new wheeled chassis on which the containers travel to and from the railhead.

UP Chairman Jim Young told the Journal of Commerce he expects UP will set a record for container loads before year-end.