The Maritime Line between Truro and Falmouth has carried its millionth passenger since the train service was doubled in May 2009.
The million journeys made between mid May 2009 and now, contrasts with the 579,081 journeys made in the two years prior to the service improvement, a increase of around 60%.
2011 has already seen 18.6% more journeys than last year with over a quarter of a million (256,407) made between January and the end of June.
The doubling of the train service was made possible thanks to a Cornwall Council led scheme costing £7.8m, which included £4.67m from ERDF (European Regional Development Fund) Convergence, £2.50m from Cornwall Council and £600,000 from Network Rail.
Penryn station was completely rebuilt and the new passing loop and associated signalling installed to allow trains to run every 30 minutes which they do throughout the day, Monday to Saturday, with hourly trains on Sundays.