The three-car dmus were ordered in March 2009 and are a development of
the class 3000, 23 of which were supplied by CAF to Translink between
2002 and 2004. The class 4000 is five tonnes lighter than its
predecessor and features a driver assist system for more efficient
acceleration and braking, fuel-efficient transmission, and reduced
exhaust gas emissions to comply with EU Stage IIIA standards.

nir-class4k.jpgEach train accommodates 212 passengers, 12 more than the class 3000,
and there are new multi-purpose areas to accommodate pushchairs and

Two more trains will arrive in the next few weeks and three sets will
undergo simultaneous testing this summer. The first trains will enter
service on the Belfast - Larne line and all 20 will be deployed by the
end of next year.

In preparation for the introduction of the Class 4000s a programme of
infrastructure improvements is underway including platform extensions
at 19 stations and a new maintenance depot at Adelaide in Belfast.
Longer-term enhancements include an upgrade of the Coleraine -
Londonderry line, which is scheduled to take place in 2014-15.