Amtrak says it plans to run more trains in Michigan during the summer holiday season. It’ll also temporarily change some regular trains’ schedules while it works on tracks and signals.

The bulk of the shifts affect Blue Water service between Port Huron and Chicago. The Pontiac-to-Chicago Wolverine line will include an extra eastbound train most Sundays and an extra westbound one most Mondays.

The changes start Monday May 19 and end August 31.

Extra routes between Detroit and Chicago offered between December 22nd and January 3rd

Week of Thanksgiving is busiest of year for Amtrak

Track improvements between Kalamazoo and Dearborn among projects around Michigan

Some passengers might have to take buses to different rail lines.