Buses will replace trains between Leeds/Bradford Forster Square and Ilkley on Saturday 18 and Sunday 19 February.
Engineering work is taking place between Kirkstall Forge and Ilkley and between Guiseley and Shipley, closing all lines all day on Saturday and Sunday.
As a result, buses will replace trains between Leeds and Ilkley, and Bradford Forster Square and Ilkley.
Northern suggest planning your journey using the National Rail Enquiries Journey Planner.