 As Hamley Bridge is only from the capital and major port, this break of gauge soon became a sore point, leading lobbying over decades to extend the narrow gauge all the way to the capital and that port.Trains reaching Hamley Bridge may have travelled from Oodnadatta, thus illustrating the poor design of this break of gauge.The break of gauge at Hamley Bridge was very cramped and poorly sited due to rivers, bridges, gradients and curves, which were difficult to improve upon.