Washington State Ferries’ peak season begins Wednesday, May 1, with an additional 25 percent surcharge applied to full fare vehicle/driver tickets. It’s even higher, 35 percent, on the Anacortes to San Juan Islands routes.

Peak season rates are unchanged from 2012, according to a State Ferries news release. The surcharge does not affect passenger fares or frequent user multi-ride fares.

The seasonal surcharge helps pay for increased operational costs that come with increased traffic May through September.

For a driver of a standard sized vehicle, the cost on the Clinton to Mukilteo route will rise from $6.35 to $7.75. A 20-ride commuter card will still cost $126.60 for an average-size sedan, which works out to $6.33 per crossing.

On the Coupeville to Port Townsend route, cost for a car and driver will rise from $8.20 to $10.25. The 20-ride commuter card will remain $164.20 or $8.21 per crossing.