Renovations to the Piraeus-Kifissia electric railway (ISAP) route were finally complete on Monday with services resuming to normal operation.
The project has been completed following three years of notorious delays, hiccups and detours that have bedeviled thousands of passengers who depend on the services every day.
According to the original plan, works to upgrade the grid were supposed to have been completed by the end of 2009, at the cost of 800 million euros.
But the project ran into numerous hurdles including archaeological discoveries and unfavorable geological conditions.
The first ISAP line, conducting routes from Piraeus to Thision, was inaugurated on February 27, 1869 as a steam train connecting Athens and its port.