Trains were dramatically pulled off the route and transferred to Fife when the Forth Road Bridge was closed for safety reasons on Friday, December 4.
Rail passengers from have not been able to travel to Falkirk town centre’s Grahamston since then
This has proved to be a headache a headache for commuters, shoppers and revellers heading for a Christmas night out between the two towns.
However, Scotrail has told this newspaper that work is well underway to have the service restored to normal.
A company spokesperson said: “We would like to thank our customers for the incredible patience they have shown over the closure of the Forth Road Bridge.
“We are particularly grateful to the people in other parts of the country, like Cumbernauld who have seen their own service impacted by the need for us to move carriages to Fife to deal with this unprecedented situation.
“Our team will be working over the festive period to bring our services back to their normal shape.
“Unfortunately, returning services to normal is not an overnight fix.
“A lot of factors, such as train diagrams, platform arrangements make this a complicated exercise.”
The news rounds off what has been a chequered year for Cumbernauld Station.
Despite being subject to a £1 million revamp to accommodate electrification, services from the station have elicited a host of complaints from Cumbernauld Commuters Association.
Scotrail was forced to admit that Cumbernauld had the worst train service in Scotland after it emerged that the 4.22pm service from the town to Dalmuir was late more often than it ran on time.
Passengers travelling into Glasgow at night have also found that a rail replacement service has elongated a number of journeys as engineering works are completed on the route.
Scotrail insists it is doing all it can to improve services.