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BUCKS COUNTY, Pa. (CBS) — There are big changes coming to SEPTA’s Warminster Line.

Starting Tuesday, shuttle buses will replace rail service in six towns due to a track improvement project.

Officials say the inbound and outbound buses from Warminster and Glenside will depart earlier than the scheduled trains.

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Outbound buses from Glenside and Warminster will also arrive later.

Construction is expected to continue through December.

If you are a SEPTA rider, officials say check for changes before heading out.