A speeding motorcycle in St. Paul hit a car driven by a woman suspected of being impaired, sending the rider tumbling to the pavement and leaving him with little chance of survival.

The collision occurred about 6:15 p.m. Sunday at the intersection of Maryland Avenue and Hazelwood Street, according to police.

The 21-year-old motorcyclist was taken to Regions Hospital with “grave injuries” and is not expected to survive, said police spokesman Steve Linders.

The car’s driver, 26-year-old Macy L. Robinson, was jailed on suspicion of driving under the influence and has yet to be charged.

Robinson said she was heading east on Maryland and making a left turn onto northbound Hazelwood toward her home up the block, when the motorcycle hit the rear passenger side of her car.

The motorcyclist was “driving at a high rate of speed” and went “over the handlebars, into the air and then down on the street,” Linders said.

Emergency responders took him to Regions, where he underwent surgery, police said.