Public Transport Victoria reported service reliability was at 97.8 per cent and punctuality at 79.1 per cent.

This compares to the April reliability figure of 99.7 per cent and punctuality figure of 79.1 per cent.

Compared to May 2018 punctuality along the line has improved by 5.5 percentage points.

Reliability was about the same at 97.8 per cent.

Victoria-wide V/Line delivered 86.5 per cent of services on time in May, which was a 6.2 per cent increase on the same month in 2018.

The regional rail operator also delivered 97.1 per cent of its scheduled services.

PTV also reported that the three busiest lines - Geelong, Ballarat and Bendigo - all delivered significant improvements in punctuality compared with the same results for May 2018.

Of the three the Bendigo line recorded the biggest improvement, setting punctuality at 87.3 per cent which was an increase of 10.3 per cent on the previous year.

"We're working with all operators to improve their punctuality and reliability as well as enabling the major program of essential infrastructure upgrades to the state's public transport network to be delivered," PTV chief Jeroen Weimar said.

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