Updated at 11:09
All lanes on the south side of George Washington Drive have been reopened, but the north side remains closed and traffic is diverted on Chain Bridge Road.
There was a previous problem with a chasm in which the walk had been closed.
The chasm lies near the northbound lanes on the side and engineers have said that it is about 10 feet deep.
Updated at 10:25
The southbound lanes of George Washington Parkway, near Turkey Run Park, are expected to reopen shortly, but the north side will remain closed for a long time after the hole in the chasm has caused the road to stop for about four hours. .
The bowl is located near the north side of the boardwalk and the experts closed the road on both sides to allow the teams to determine if there was significant damage under the tracks.
Officials from the National Parks Service said on Twitter that the south side of the road was "reopening." Transportation engineers "determined that the chasm did not pose an immediate risk to southbound lanes.
But the north side of the promenade may stay closed longer. The officials did not specify the exact duration of the closure of the road.
Original position at 6 o'clock
All lanes in both directions of the George Washington Drive near the Turkey Run Park are closed due to a gulf, causing long traffic delays on Chain Bridge Road and Capital Boulevard.
US park police said the boardwalk would probably remain closed at least during the morning rush. Northbound traffic is diverted on Chain Bridge Road and delays are occurring. Southbound traffic is diverted along the Beltway, forcing cars to pass over the American Legion Bridge.
Transportation officials warned that drivers should take other routes and expect heavy traffic.
Park officials did not specify the exact size of the pit, but information suggests that it is about three feet wide and up to eight feet deep. The bowl is on the side of the road and teams are on site to check for damage underneath the roadway.
Jenny Anzelmo-Sarles, a spokeswoman for the National Park Service, said on Twitter that teams from her agency, Fairfax County firefighters and other experts were being brought in to examine the scale of [the] pity."
The duration of the repairs has not yet been determined, but transport officials warned that it would probably be closed for an "extended period".
Anzelmo-Sarles said the sinkhole appears to be caused by a "deep-seated storm drain pipe," she added.
There is a problem with another road in Maryland.
Parts of Beach Drive in Montgomery County are closed due to high water.
And in the district, part of the south side of Interstate 295 is closed due to "erosion by heavy rains," according to Washington police. It is not known how long the road will be closed.
Commuters in the area shared their concerns and frustrations with the state of the roads, especially along the GW Parkway, on social media.