State ferry, light rail changes begin this weekend. Here's how to navigate them.

Bremerton and Bainbridge Island ferry schedules will shift for the next two weeks beginning Saturday as construction rolls along at Colman Dock.

The adjusted schedule will make sure that only one boat is in Seattle at a time, allowing crews to work at the north end of the ferry dock. Washington State Ferries notes that most sailing times will shift by between five and 30 minutes and that sailings later in the evening may shift by as much as one hour. Some sailings may take longer than normal to avoid having more than one boat at the dock.

The temporary schedule runs Jan. 4-20. The full schedule can be found at wsdot.com/ferries.

“January is typically one of our lowest ridership times,” said Ferries spokesperson Sharon Gavin. “So this is the best time when we can do something like this and inconvenience as few people as possible rather than having to do it, say, in the middle of summer when we have our highest traffic.”

Kitsap Transit will also shift schedules on several bus routes to line up with the adjusted ferry schedule. More information on bus schedule changes can be found kitsaptransit.com/blog/rider-alerts.

The tweaked ferry schedule will allow workers at Colman Dock to finish tearing down the rest of the old terminal building, take out old piles at slip No. 2 and drive new steel piles there, Gavin said. Crews can then begin to lay new decking and start construction on the rest of the new passenger terminal in the coming months.

Construction on the $455 million rebuild of Colman Dock is projected to wrap up in 2023, leaving a seismically strengthened ferry dock.

Separately, Sound Transit’s Link light rail schedule will shift as construction begins on a new rail leg that will run across the Interstate 90 floating bridge out to Mercer Island, Bellevue and Redmond.

For a 10-week period beginning this weekend, Sound Transit is telling riders to prepare for delays and allow at least 30 minutes of extra time for their rides. During the work – labeled Connect 2020 – trains will run every 12 minutes and may be crowded.

This weekend, Jan. 4-5, work kicks off and will close the light rail completely in downtown Seattle from Capitol Hill to SODO stations. Shuttle buses will instead make runs stopping at the downtown stations. Other weekend closures are planned for Feb. 8-9 and March 14-15.

Beginning Jan. 6 through March 13, the light rail will be split at the Pioneer Square station into two routes: Angle Lake-Pioneer Square and University of Washington-Pioneer Square. Passengers wanting to travel north or south of Pioneer Square will need to exit on to a new center platform at that station and transfer to the train on the opposite side of the tracks.

For more information on the light rail changes, visit connect2020.soundtransit.org.