An alleged wrong-way reckless driver on Route 3 in Weymouth hit several vehicles and crashed into a guardrail Saturday evening before he got out of his vehicle while carrying a knife, according to Massachusetts State Police who tried to tase him.

After troopers were unable to tase the suspect, he allegedly threw the knife toward the woods and was arrested. The suspect was transported to South Shore Hospital in Weymouth for a psychiatric evaluation.

State Police out of Norwell at around 8:25 p.m. on Saturday started to receive calls of a wrong-way driver heading south on Route 3 in the northbound lane in Weymouth.

“According to cell phone callers, the vehicle was driving recklessly towards oncoming traffic and caused numerous accidents on Rt 3,” a State Police spokesperson said in a statement.

Troopers and local police officers on Route 3 tried to find and parallel the suspect vehicle. At some point, the suspect vehicle got back on Route 3 in the correct direction, turned around and proceeded to travel in the wrong direction (heading south in the northbound lane) again.

“After causing multiple crashes with unsuspecting, oncoming traffic, the suspect crashed his vehicle into the guardrail / median area on Rt 3 in Weymouth,” the State Police spokesperson said.

Multiple witnesses then saw the suspect walking outside of his vehicle while holding a knife, and police were alerted.

The suspect’s vehicle crash and all the other motor vehicle crashes caused two lanes of Route 3 to be shut down, with only the breakdown lane getting by.

The suspect was not immediately named, and the charges were not available.