The delays continue as Metro is grappling with problems with train wheel assemblies that led to a derailment earlier this month.
The U.S. Park Police said a person was killed in the crash along the parkway near VA 123.
Metro said the delays were caused by a problem with a switch at the Smithsonian station.
Communication troubles caused delays on MARC and VRE commuter trains, officials said.
The bill initially was introduced in March 2020 as the coronavirus pandemic took hold in the region.
The rally is scheduled to begin at 11 a.m. at Freedom Plaza, then wind toward the steps of the Supreme Court.
The Biden administration reversed a Trump decision that had kept bikeshare off the White House grounds since 2017.
No injuries were reported in the incident.
A Centreville resident whose gun was loaded with 13 bullets was cited on weapons charges by airport police.
Since the program began in June, more than 32,000 people have paid $44 million in fines without facing late fees.
Rainfall totals in a 24-hour period showed much of the D.C. area received 1 to 3 inches, with parts of Frederick County getting more than 4 inches of rain.
Metro said Montgomery leaders want the Metro station to reflect development in the surrounding area.
The move is a step toward converting the transit agency’s fleet to electric by 2045.
The Sunday afternoon crash on Rockville Pike is being investigated by Metro and Montgomery County police.
Flooded roads caused some vehicles to be stranded in D.C. region.
The four-month amnesty deal began June 1 as the city ended a year-long pandemic-induced reprieve from some ticketing.
Crews have started to put up perimeter fencing around the U.S. Capitol area in preparation for a rally in support of those arrested in the Jan. 6 attack.
A tractor-trailer and two other vehicles collided on the eastbound side of Interstate 66 near the Capital Beltway, leaving three people dead.
