The disruption is caused by signal problems between Broadway Junction and Myrtle Ave.-Wycoff Ave.
Shuttle buses connected Yonkers to 242nd Street, where commuters could take the 1 train.
L train service was disrupted Friday morning over a report of smoke in the subway, officials said.
A multi-vehicle accident briefly closed the outbound lane duirng Friday evening rush hour.
About 18 people suffered minor injuries in a bus crash on the the northbound ramp to the highway.
The MTA said to expect systemwide delays of up to 20 minutes on the LIRR during the evening commute.
Six people were injured when two trucks crashed on the Verrazano's upper level, the FDNY said.
The truck jackknifed near the 138th Street exit and sparked massive delays during rush hour Wednesday.
The crash occurred near Rogers and Clarkson avenues Wednesday morning, the FDNY said.
The man was hit about 6 a.m. inside the Atlantic Avenue Terminal, FDNY said.
The huge fire erupted about 6:15 a.m. near 3985 White Plains Rd. and disrupted the 2 and 5 trains.
The victim was hit by the F train in the Sutphin Boulevard Station in Briarwood, according to the FDNY.
The westbound lanes of the Lincoln Tunnel have reopened after a garbage truck overturned, officials said.
An LIRR train derailed about 9 p.m. near the Forest Hills station, an MTA spokesman said.
Commuters could face slow traffic conditions because of snow, Monday evening, forecasters say.
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