Arriva Yorkshire allowed all valid train tickets on its buses during a RMT union strike on Monday, the Bradford Telegraph and Argus reported.
The union is disputing plans to bring in more driver-only-operated trains across the network in the north of England, after the strike action affecting the Southern rail network spread. More than half of services on Merseyrail and Northern Rail were cancelled.
Rail passengers were able to travel on Arriva and Yorkshire Tiger services free of charge providing they had an appropriate ticket.
Jon Croxford, Area MD for Arriva, said: “Monday will be a stressful day for the public as they try to get to and from work, or go about their normal daily routine.
“We would encourage people to download the Arriva Bus App where they can plan their journey and live track their bus to the stop. We hope we can do our bit to make life a bit easier.”