DeWitt, N.Y. - Interstate 481 in the town of Dewitt will be closed for nearly two weeks in late April and early May for construction related to the Interstate 81 Viaduct Project, according to a news release from the state Department of Transportation.The highway will be closed between Exit 88 (Inter state 690/Syracuse) and the I-690 eastbound on-ramp in order to facilitate paving operations, officials said. ...read more read less