The state ferry system’s annual peak-season surcharge goes into effect Wednesday.

The surcharge will increase fares for vehicles on all routes by 25%, except for vehicles traveling from Anacortes to Lopez, Shaw and Orcas islands, as well as Friday Harbor on San Juan Island. Those fares will increase by 35%.

For example, a one-way trip on the Seattle/Bainbridge Island route will see an increase of about $4 to $22.25 for a standard-sized car and driver, according to Washington State Ferries.

The surcharge applies to single vehicles crossing Puget Sound but does not apply to passenger or multi-ride fares. Senior passengers ride for half price, and youth ages 18 and under ride free on all routes.

The peak-season pricing will continue through September, covering the busiest months of the year for ferry travel.

Vehicle fares are available online at wsdot.wa.gov/ferries/fares.

Fares vary by route, depending on location, sailing time and other factors.

For Port Townsend/Coupeville and Anacortes/San Juan Islands routes, travelers can reserve their spot on the ferry for the summer season through Washington State Ferries’ website.