The first weekend of fall will be a big one for sporting events in the D.C. region. The Nationals play a four-game series with the Brewers as they wrap up their next-to-last homestand of the regular season. The Redskins play the Bengals in their first home game Sunday afternoon, and D.C. United is at RFK Stadium to face Chivas USA at 7 p.m. Sunday.

For a break from all that, consider Saturday’s Dulles Day Family Festival and Plane Pull at the airport, or the National Book Festival on Saturday and Sunday at the National Mall. For a last fling at the beach, Ocean City is celebrating its annual Sunfest through this weekend. If you’re not up for a fest that far, try Saturday’s Barracks Row Fall Festival on Eighth Street SE, near the Eastern Market Metro station.

Speaking of Metro, Saturday is Car Free Day. Supporters in the D.C. area for this international effort hope that your mode of transportation for the day will be walking, biking or taking transit. You’ll find a list of events on the Car Free Day Web site.

The Capital Weather Gang says Sunday will be the better of the two weekend days for travelers, though it could be much cooler than Saturday.

Here are more details about the traffic and transit issues travelers will face in getting around this weekend.

Metro weekend delays

The track work schedule will affect the Red and Orange lines from 10 p.m. Friday through Metrorail’s closing at midnight Sunday.

Red Line: Free shuttle buses will replace trains between Grosvenor and Friendship Heights. Trains will operate between Shady Grove and Grosvenor, and between Friendship Heights and Glenmont.

From 9 a.m. to 9 p.m. Saturday and Sunday, trains are scheduled to run every 10 minutes, Metro says. At other hours, they will operate at regular weekend times. Add about a half-hour to your normal travel time if you go through the work zone on the shuttle buses.

The last train from Shady Grove to Grosvenor will leave at 1:58 a.m. Saturday and Sunday, 32 minutes earlier than normal for the night owl service, so that riders can make the shuttle bus connections. On Sunday night, the last train will leave Shady Grove at 10:58 p.m., Metro says.

Orange Line: Trains will share tracks between East Falls Church and Ballston, and between Stadium-Armory and Cheverly. They will run every 24 minutes throughout the weekend, Metro says.

Add about 15 minutes of travel time to get through the work zones.

Closest Metro stops for the big weekend events: Navy Yard near Nationals Park, Stadium-Armory near RFK Stadium, Morgan Boulevard for FedEx Field.

Beltway/Telegraph Road

The Wilson Bridge project is planning some extensive closings of lanes around the Capital Beltway’s Telegraph Road interchange, site of the project’s last major reconstruction effort.

This includes Friday night and Saturday night closings of the outer loop’s THRU lanes in that area. Traffic will be diverted to the LOCAL lanes.

11th Street closing

The District Department of Transportation plans to close 11th Street SE between M and O streets from 6 a.m. to 10 p.m. Saturday. Workers will demolish a wall along 11th Street.

Local traffic heading to Anacostia from M Street SE and the Navy Yard area will be detoured onto the ramp at the intersection of M and 11th streets to southbound I-295, then to Howard Road SE. From there, drivers can reach Martin Luther King Jr. Avenue SE.

Maryland bridge inspections

The Maryland State Highway Administration is planning some routine inspections of highway bridges, and they will require lane closings.

Watch for lane closings from 5:30 a.m. to 12:30 p.m. Saturday on Interstate 695’s outer loop at Route 170 in Anne Arundel County. In Montgomery County the right lane of the Capital Beltway’s outer loop over MacArthur Boulevard and the Clara Barton Parkway will be closed from 4:30 to 11:30 a.m. Saturday. On Sunday, the right lane of the inner loop will be closed in the same area during those morning hours.