Leeds railway station was closed on Saturday because of a fault with the signalling system.
Network Rail said the signalling problem happened at about 16:00 BST and was fixed by about 17:00 BST, but journeys would be disrupted for the rest of the day.
It said that trains to, from and through the city were cancelled, delayed by up to two hours or diverted.
Train operator Northern reported “severe disruption” on all its services and added: “We ask that customers do not travel.”
