Washington State Ferries is advising ferry travelers to play for heavy traffic on the days leading up the the Fourth of July.

Drivers can expect the longest lines at ferry terminals on westbound sailings from Wednesday, July 2, through Friday, July 4.

Heavy traffic is expected eastbound sailings on Sunday, July 6.

Drivers should expect longer-than-average wait times at ferry docks and Canadian border crossings for most of the holiday weekend, officials said.

According to the Washington State Department of Transportation, most construction projects around the state will suspend work from noon Thursday, July 3, until noon Monday, July 7.

While there may not be any active construction during the holiday weekend, drivers should prepare for shifted lanes, roadway detours and reduced-speed zones in places.

Drivers crossing the State Route 520 bridge on Friday, July 4, will be charged weekend toll rates due to the holiday. The East Navigation Channel under Highway 520 will be open for boaters from 6 p.m. Thursday, July 3, until 7 a.m. Monday, July 7. Both the east and west navigation channels around Highway 520 will be congested during this time, officials noted.

Know before you go

• 511 – Call the driver-information line for current traffic, incident and closure information. TTY users can call 1-800-833-6388. Out-of-state callers can call 1-800-695-ROAD (7623).

• On WSDOT’s travel website, drivers will find traffic-camera images from across the state, the Washington State Ferry schedule and a map highlighting current highway incidents and closures.

• WSDOT provides traveler information using social media like Twitter and Facebook and via mobile devices. Drivers can also sign up for specialized email alerts.

On the road

• Overhead and roadside electronic signs provide information about blocking incidents and other traffic delays.

• Highway advisory radio – WSDOT advises drivers to program 530 AM and 1610 AM on their radios.