Train firms are urging people to only travel if absolutely necessary this week as strikes hit again.
It comes after thousands of train operators and Network Rail workers walked out in a national strike in June – the biggest of its kind in 30 years.
This week’s strike action by RMT is set to take place on Thursday 18 and Saturday 20, with further disruption expected to services on Friday 19 and Sunday 21.
Some 40,000 workers across Network Rail are expected to walk out.
Northern Rail have advised rail users to not travel during the industrial action dates and check their journey carefully before boarding on the days after.
TransPennine Express will be running a small percentage of its usual services on the strike days and a reduced train plan will be in place on the days following each strike date which means services are set to start later and finish earlier than usual.
Kathryn O’Brien, Customer Service and Operations Director for TransPennine Express, said: “This week’s strike action by RMT will once again have a big impact on rail customers right across our network, and we will only be able to operate a small number of trains across certain routes.
“The days after each strike will also be affected and so anyone planning rail travel between 18-21 August should seek alternative means and only make journeys if they are absolutely essential.
“We also know that lots of people normally rely on our trains to travel to big events, such as the popular Ebor Festival at York racecourse. Sadly, this time around, we won’t be able to support people heading to this year’s event and we are urging people to plan accordingly and find an alternative way to get to and from the races.”
Avanti West Coast will also be operating a reduced timetable until next Monday and customers are advised to avoid travel. Those making an essential journey are asked to plan ahead as they are likely to face severe disruption.
Those affected by the disruption to services may be entitled to compensation.