Jayson Bastarache, of Grafton, was struck on the eastbound lanes of the interstate near mile marker 98 around 7 p.m. Wednesday, Jan. 22, Massachusetts State Police said.
Police listed Bastarache as a pedestrian, but a bicycle was found near the crash site and footprints nearby. It's unclear why he entered the interstate.
State Police shut down all but one lane of I-90 for about four hours to investigate and clear the scene.
The crash remains under investigation by the Massachusetts State Police and Worcester County District Attorney's Office.
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