A project to replace railroad ties in Hays could lead to delays at crossings.

The city of Hays announced Friday that Union Pacific will consist of two tie crews. The first crew will begin Saturday at Ash Street and work east. The second crew will begin Monday at 150th Avenue, near Yocemento, and work east.

Train traffic will be shut down, and crossing signals also will be turned off while the crews are working. Flag crews will direct traffic when it is necessary to temporarily shut down crossings.

Train traffic and signals will resume after the crews finish work each day.