Trains will move to a reduced timetable from Monday with a focus on providing public transport for key workers during the coronavirus pandemic.
ScotRail said changes to the timetable are necessary as availability of its staff as well as those at Network Rail Scotland have been affected, while there have been changes to customer demand.
It said reducing the number of trains in service will give more time for extra cleaning on trains and in depots, as well as more targeted cleaning at stations.
The Scottish Government said the decision to reduce services has been taken to protect services for essential workers and allow vital freight trains to continue to operate.
The changes will be similar to a Sunday service with some additional first and late last trains for key staff, while off peak passenger services may be reduced further depending on demand.
Transport Secretary Michael Matheson said: "Following discussions with rail industry partners, passenger services will see a reduction as we continue to tackle the coronavirus.
"We know that rail provides an important service in moving passengers and goods around the country - however we will reach a point where travel is reduced to essential journeys only.
"Moving to a reduced timetable will not only help ensure some passenger services continue to run, it will enable freight to be prioritised so goods and emergency supplies such as medicines can be moved around the country."
