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Ninety-six miles of railroad track upgrades, including the installation of 250,000 new ties, will resume Friday as part of the preparation of Amtrak’s high-speed rail service along the Chicago-to-St. Louis corridor.

The work will require Amtrak to substitute chartered motor coaches for some Lincoln Service trains, as well as detour the Texas Eagle service between Chicago and St. Louis, Amtrak officials said in a prepared statement.

The temporary changes will allow Union Pacific Railroad crews to improve infrastructure that will enable Amtrak to increase train speed to 110 mph along those routes. Currently, the maximum train speed is 79 mph.

The Chicago-to-St. Louis corridor is one of the first high-speed rail projects in the country to begin construction.