“The great project of Khaf-Herat railway – operation of which has also been commenced – will create a significant development in transit and connecting Afghanistan with regional and extra-regional (Europe) countries. Its connection to the railway of Central Asia, Turkey and Europe via Iran and also its connection to Iran’s nationwide railways network – which will stretch from Bandar Abbas to Afghanistan – can play an important role in economic growth and development of Afghanistan,” the foreign ministry official [Mohsen Pakaein, Chief of Afghanistan Headquarter at the Iranian Foreign Ministry] said.

Source: FM Official Underlines Iran’s Growing Aid to Afghanistan, Fars News Agency, 2011-07-04

Presumably operation means “construction”, rather than train operations.