Drinking alcohol on trains and in stations has been temporarily banned from today.
ScotRail announced last week that it would be introducing the new measures to curb the spread of coronavirus.
British Transport Police officers and railway staff will be enforcing the new measures.
Body cameras will also be used by some frontline staff to help with the enforcement of the restrictions.
The restrictions are aimed at ensuring the public maintain physical distancing and keep their face coverings on at all stages of the journey.
ScotRail will be reviewing the rules continuously as government guidelines change.
Messages about the ban have been shared on social media, customers information screens and announcements at stations.
David Lister, ScotRail Sustainability and Safety Assurance Director, said: “Throughout the pandemic, our people have been working flat out to deliver a safe and reliable service for customers throughout the country.
“Our five rules for safe travel have been followed by customers and the introduction of these restrictions on alcohol will help to ensure that our staff and customers remain safe.
“We ask that everyone travelling on our trains, and passing through stations, play their part and comply with this clear guidance.”
