-- Replacement of original Dart trains is just 0.8% of the transport capital budget up to 2030.-- The Government is accused of gambling with the reliability of the rail network.-- If the order isn't made soon, delays could be prolonged as the production line stops. The Department of Transport is remaining tight-lipped as to why a straightforward order for the replacement of the original Dart trains -- which are breaking down at an increased frequency -- has been bundled into the Government's National Development Plan review.