The report does not show, nor claim to show, that the line is viable, only that a wider view of the net costs and benefits to NZ arguably should be considered, writes Stephen Selwood.

Auckland's $1.14 billion rail electrification project is chugging into the home straight, ready for the arrival in September of the first of 57 zippier and quieter trains.

For anyone who doubts the need for the inner-city rail tunnel, the recent draft public transport plan is the document to change your mind, writes Brian Rudman.