No trains will run to and from Wemyss Bay on May 25 and 26 if planned industrial action by the RMT union goes ahead.
The union’s members - including signallers, maintenance workers and some station staff at large stations such as Glasgow Central - are due to walk out for 24 hours, and to implement a 48-hour work-to-rule, in a dispute over pay.
ScotRail - whose own staff are not involved in the dispute - announced on Wednesday that the vast majority of its train services would be cancelled on both days in the event of the industrial action taking place.
A limited service will run between Glasgow Central and Paisley Gilmour Street on Monday, May 25 only, but there will be no services west of Paisley on either date.
For full details of the limited ScotRail services on Monday and Tuesday, see www.scotrail.co.uk/plan-your-journey/uk-wide-rail-strike-plan-your-journey
Phil Verster, managing director of the ScotRail Alliance, said: “If this UK-wide industrial action goes ahead as planned, the impact on customers is going to be severe. For the vast majority of people in Scotland, there will be no train service at all on these two days.
“We will only be able to run a handful of services, and those that we are able to run will operate on a reduced service. Those services will be much busier than usual, so if customers are able to make other arrangements, I would kindly ask them to please do so.
“We have released this information early because it is our priority to make sure that our customers have enough time to make decisions about their journey.
“We have been in contact with employers and business organisations to let them know about the impact of the strike. We are also in touch with local authorities, the NHS and other public bodies to make sure that they are fully aware of what is happening.
“I am disappointed that our customers have to experience this level of disruption. We are doing everything we can to safely run as many services as is possible under the circumstances.
“I am asking customers to please take action now and to make alternative travel arrangements for Monday and Tuesday. Visit our special web page daily during the run up to the strike and use our JourneyCheck alert service, or the ScotRail app from Saturday onwards to make sure you have the most up to date information about your journey.
“I know that many people right across the country are going to be seriously inconvenienced by this UK-wide industrial action. I am genuinely sorry that, under these circumstances, we cannot run our normal levels of train services that our customers expect. I hope that by releasing the information early, we are giving customers and employers enough time to plan ahead and make other plans.”