Labor Day weekend is often the last big weekend of summer festivities, and Washington State Department of Transportation officials are urging would-be travelers to plan ahead and be prepared for probable congestion this year.

Washington State Ferries passengers should expect heavier traffic during the holiday weekend, and reservations are strongly recommended for the Anacortes-San Juan Islands; Anacortes-Sidney, British Columbia; and Port Townsend-Coupeville ferry routes.

However, to ease congestion statewide, WSDOT suspends most state highway construction work during the holiday weekend, including on Friday, Aug. 31. This year that includes wrapping up the Interstate 90 work over Snoqualmie Pass before the holiday, so that the divided westbound lanes will no longer be in place.

Reservations can be made online at www.wsdot.wa.gov or by calling 888-808-7977.

Travelers are encouraged to check WSDOT’s mobile app, Facebook page, multiple Twitter accounts and online tools for traffic information and ferry delay updates.

Also, most public transit systems will follow a holiday schedule, and some transit systems will not operate fixed-route or Dial-A-Ride service on holidays, and Amtrak Cascades passengers are encouraged to purchase tickets early and should plan to arrive at the station one hour before departure.

Travelers can consult WSDOT’s holiday-weekend traffic volume charts (available at www.wsdot.wa.gov/congestion/laborday/2018/driver-tips).