 Freight trains struggle to maintain this speed in places.The number of curves along the entire route have been calculated to be equivalent to rotating the train by 72 circles (36 circles to the right and 36 circles to the left).For a long time, the corridor was double track from Sydney to Junee, and single track from there on with a number of short crossing loops, but between 2008 and 2011 about of the former broad gauge track between Seymour and Wodonga was standardised to form a double track section north of Seymour.