The New Zealand Railways Magazine, Volume 3, Issue 7 (November 1, 1928)
I am pleased to place on record the fact that the net ton miles of goods traffic conveyed per train hour improved by 5.5 per cent. for the Dominion. The district increases are:—Auckland 2.5 per cent., Ohakune 7.9 per cent., Wanganui, 4.1 per cent., Christchurch 4.7 per cent., Dunedin 10.5 per cent., Invercargill 16.2 per cent. and Westport 28.4 per cent.
Passenger train speed (train miles per train hour) for the Dominion improved by 1.0 per cent.