This story has been updated.
A serious crash involving a motor vehicle and motorcycle caused stop-and-go delays on a stretch of the southbound Sprain Brook Parkway.
The crash, reported at 2 p.m., was just south of the Jackson Avenue exit in Greenburgh.
The other car/motor cycle crash was reported at 2:15 p.m. on southbound Route 9A near Pleasantville Road in Mount Pleasant.
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