Travelers will encounter summer-like conditions today before storms roll in Tuesday, then sun and clouds will play tag the rest of the week, the Capital Weather Gang says. This week’s traffic report begins with a string of projects brought to you by the National Park Service, but there’s plenty of other work scheduled, including a lot of Metro maintenance this weekend.

Constitution Avenue

As the National Park Service rehabilitation project from 23rd to 15th streets NW gets underway, this week’s work will include temporary closings of the parking lanes. Closings will occur at off-peak times and will be performed in one-block sections, the park service says.

Construction work is scheduled to begin on the north side of the roadway, the side heading toward Foggy Bottom and the Roosevelt Bridge. Work will be performed in one-block sections, with a maximum of two lanes closed in each direction closed at any time. [See Tom Jackman’s take on what Northern Virginia drivers are in for: The State of NoVa.]

17th Street levee

The park service and the Army Corps of Engineers are starting construction of a levee across 17th Street, just south of Constitution Avenue. The first work will be on the east side of 17th Street. At least one lane will be open in each direction at all times, the park service says.

GW Parkway at airport

On Tuesday and Wednesday, the ramp from Reagan National Airport to the northbound George Washington Parkway is scheduled to be closed for maintenance. The closing will start at 7 am. Tuesday, the park service says.

Drivers leaving the airport can take the ramp to the southbound lanes of the parkway, toward Alexandria, then return to the northbound lanes. Watch for variable message boards.

Rock Creek Parkway

The park service says the rehabilitation project is moving into its next phase this week, but rush hour delays for drivers will continue. Traffic will be switched from the northbound to the southbound lane on Shoreham Drive/Calvert Street and from the southbound to the northbound lane on Cathedral Avenue.

Between 7 and 9:15 a.m. weekdays, traffic will be able to enter the Shoreham Drive/Calvert Street ramp next to the Shoreham Hotel from southbound Connecticut Avenue at Calvert Street and proceed to southbound Rock Creek Parkway toward downtown Washington. The Shoreham Drive/Calvert Street ramp will be closed to southbound traffic at all other times.

At 9:30 a.m., the traffic direction will be reversed, so drivers can go northbound on the Shoreham Drive/Calvert Street ramp. That pattern will continue the rest of the day.

After 9:30 a.m., traffic will be able to go northbound only onto Cathedral Avenue, leading to Woodley Road and Connecticut Avenue. There will be no access to the Shoreham Drive/Calvert Street ramp and the Rock Creek Parkway from southbound Cathedral Avenue at any time during this phase of construction, the park service says.

Metro weekend work

Metro’s weekend work suspension is over. This weekend, the transit authority plans to continue its bridge repair program outside the Cheverly Station, and that will have a major impact on Orange Line service.

Five stations will be closed between Stadium-Armory and the end of the line at New Carrollton from 8 p.m. Friday to the train system’s midnight closing on Sunday. Metro will operate free shuttle buses between Stadium-Armory and New Carrollton. The shuttles for these planned disruptions tend to operate efficiently, but riders should add at least 30 minutes to normal travel times through the work zone.

Other lines also will be disrupted this weekend. From 10 p.m. Friday to Sunday’s closing, Metro will replace rail switches at Van Dorn Street. Regular Blue Line service will operate between Largo Town Center and Huntington, and there will be a special Blue Line shuttle operating every half-hour between Franconia-Springfield and King Street.

On the Red Line, Metro will be repairing the White Flint platform. From 9:30 p.m. Friday to the Sunday closing, trains will share a track between Twinbrook and Grosvenor. On the other side of the line, repairs will continue at Rhode Island Avenue, so from 9:30 p.m. Friday through Sunday, trains will share a track between the New York Avenue and Rhode Island Avenue stations. Add 20 minutes for a trip through the work zones.

Intercounty Connector tolls

Drivers who use Maryland’s new Intercounty Connector between Shady Grove and Olney but don’t have E-ZPass transponders are now being charged a $3 service fee as well as the toll. The grace period on the service charge ended last week. The service charges will be visible on the toll bills mailed to the vehicle owners. (And the ICC is now visible on Google Maps.)

Woodbridge I-95 ramp

The Virginia Department of Transportation expects to continue working into May on the ramp from southbound Route 123 (Gordon Boulevard) to southbound Interstate 95 in Woodbridge. The project will extend the acceleration lane to create a safer merge onto the Interstate, but until then, traffic congestion is likely in the work zone. On the weekend of May 13, the ramp and one lane of I-95 are scheduled to be closed.

Rebuilding Benning Road

The District Department of Transportation is reconstructing Benning Road NE between 39th and 42nd streets. The project includes reconstruction of the roadway pavement, curbs, gutters, sidewalks and driveways.

The work has started at 39th Street and will continue toward 42nd Street, with the northern portion of the road getting attention first, then the other side, then the middle. Workers will be there between 7 a.m. and 7 p.m. weekdays. One eastbound and one westbound traffic lane will be kept open.

Tysons Corner traffic

Drivers in Tysons Corner should watch for a new traffic pattern at Jones Branch Drive in Tysons Corner near the McLean Hilton and Gannett building, where the roadway is being narrowed from two lanes in each direction to a single lane in each direction.

Crews working on the High Occupancy Toll lanes project will be raising the road about eight feet to accommodate a connection to the HOT lanes at Jones Branch Drive. Work in that area is scheduled to continue until late this year, but all businesses along Jones Branch Drive will remain accessible, the Virginia Department of Transportation says.

See a full report on the HOT lanes work schedule on the Commuter page in the Sunday Post Metro section.

Dulles Metrorail work

The highest impact work is the nighttime closing of three lanes of the Beltway’s inner loop at Route 123 from 11 p.m. to 5 a.m. The closings, which have been going on for several weeks, can occur any night but Saturday. This is where the project is bringing the new rail line over the Beltway and must close all but one of the lanes for safety while the work is underway.

Also, watch for daytime delays related to this project in the Tysons Corner area along the Dulles Connector Road (Route 267), Leesburg Pike (Route 7) and Dolley Madison Boulevard (Route 123).