A new £3m platform at Stockport train station is unusable because plans to introduce a new computer-driven signal system have collapsed.
Network Rail admits Victorian signal boxes are controlling trains at the station after rising costs and technical problems halted the upgrade.
The company has run out of money to replace the Victorian boxes.
The new platform cannot be used, as it is impossible to connect it to the existing system.
"The original plan was over ambitious," said Nigel Barber, of Network Rail.
"We are not going to be able to install this by the summer as we had originally hoped."
The boxes should have been demolished when the Manchester to London line was upgraded 40 years ago, but British Rail ran out of money.
Now history has repeated itself.
Network Rail says the signal boxes will have to be used for a while longer, but there is no risk to passengers.