Usage
The C4K units have replaced the total of thirteen remaining trains of the older Class 80 and Class 450 rolling stock. The capacity increases provided by the introduction of the C4K fleet has allowed NIR to operate longer trains. Of the seven extra sets, NIR has earmarked five for running in six-car formations, with the other two planned to improve service frequency on the Derry~Londonderry Line once renovation work has been completed, and a new passing loop laid. The contract between Translink and CAF also allows for the purchase of an additional 20 vehicles, allowing the trains to be extended to 4-car units.
Read more about this topic: NIR Class 4000
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