Authorities temporarily closed the entrance ramp from Rte. 1 South to Interstate 95 South this afternoon following a motorcycle crash that sent one man to the hospital, according to police.

Authorities temporarily closed the entrance ramp from Rte. 1 South to Interstate 95 South this afternoon following a motorcycle crash that sent one man to the hospital, according to police.

The accident occurred at about 12:30 p.m. when a 2003 Yamaha motorcycle struck the rear of a tractor-trailer, State Police Trooper Thomas Murphy said.

The driver, whom authorities have not yet named, was airlifted to Beth Israel hospital with “serious injuries,” Murphy said.

The ramp reopened to traffic at about 1:30 p.m., officials said.