Motorcycle/vehicle accident on SR-91 kills Richmond man

A 31-year-old Richmond man died Saturday night after a motorcycle/vehicle accident just south of the Utah/Idaho border.

Mario A. Mainini was driving a Honda B-60 motorcycle south on State Road 91 about 6:20 p.m. About 50-yards south of the state line, he struck the back of an empty flat bed trailer being pulled by a black Dodge pickup truck.

Utah Highway Patrol Sgt. Cade Brenchley said the driver of the truck, 33-year-old Cody C. Chatterton of Franklin, Idaho, was slowing down in the inside lane, preparing to make a left turn, when Mainini ran into the back of him.

“I don’t know if he was distracted or just couldn’t tell,” said Brenchley. “The road is straight and flat right there, but he just didn’t notice the truck was slowed or stopped and came right into the back of it and struck the trailer. He was killed on impact.” 

Mainini was thrown from the motorcycle, causing his helmet to come off. It didn’t appear that he tried to slow down or brake before striking the trailer.

Troopers said all of the lights on the truck and trailer appeared to be working at the time of the crash.  Initially, troopers don’t believe Chatterton was at fault in any way.  

Officers from the Idaho State Police Office assisted UHP troopers in investigating the accident. Traffic along SR-91 was restricted to one lane in each direction for about two-and-a-half-hours while the crash was being cleared.

Brenchley said Mainini was returning home after visiting his family in Mink Creek.

An investigation is ongoing.

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