WESTPORT — Two major events in town this weekend will cause significant changes to usual traffic patterns.

The “Slice of Saugatuck” on Saturday and the “United Ride” on Sunday will prompt road closures on both days, as well as traffic congestion and delays, police warn.

Slice of Saugatuck will take place from 2 to 5 p.m. Saturday, Sept. 10, in the Saugatuck area framed by Riverside Avenue, Charles Street, Saugatuck Avenue and Railroad Place.

To accommodate the festival, Railroad Place from Riverside Avenue to Franklin Street will be closed to traffic from approximately noon to 6 p.m. to allow vendors and other attractions to be set up and removed, according to police.

Other roads in the area, however, will remain open. Drivers are advised to expect crowds of pedestrians in areas near the Saugatuck Railroad Station, including lower Riverside Avenue and Saugatuck Avenue. 

United Ride, motorcyclists’ 21st annual tribute to victims of the Sept. 11, 2001, terrorist attacks, will assemble at Sherwood Island State Park on Sunday morning.

After ceremonies in the park, the several thousand motorcyclists expected to participate in the event will leave Sherwood Island about 11:30 a.m. and then follow a 60-mile route through nine towns.

The procession, after leaving the state park, will head onto Interstate 95 to Exit 17 at Saugatuck Avenue, onto Route 33 north (Riverside Avenue/Wilton Road) and then cross into Wilton.

That route through town, according to police, is “closed and continuous,” meaning that motorcyclists — accompanied by a police escort — will not stop for traffic lights and stop signs.

Road closures and traffic delays Sunday along the Westport section of the route are expected to last at least 45 minutes, police said.

Motorists are advised to use alternate routes during that period, police said, because streets along the United Ride route “will be rendered completely impassable until the entire procession clears.”