GREER COUNTY - A 22-year-old Altus man died early Monday morning when the car he was driving ran off the highway north of Blair and struck a railroad crossing sign.

Joseph R. Davis died of massive head injuries at the scene of the accident around 6 a.m. two miles north of Blair on U.S. Highway 283. The Medical Examiner's Office in Oklahoma City was notified and Davis' body was taken to Greer Funeral Home in Mangum, then to Lowell-Tims Funeral Home in Altus.

According to the Highway Patrol report, Davis was driving a 1991 GEO north on the highway when he failed to negotiate a curve, ran off the right side of the roadway, lost control of the vehicle and struck a railroad crossing sign. Davis was thrown from the vehicle some 30 feet northwest of the point of impact.

He was not wearing a seatbelt, according to the report.

At least three other people died in Memorial Day traffic accidents in Oklahoma, bringing to nine the number killed statewide since the long holiday weekend began Friday, according to the Oklahoma Highway Patrol.

The victims included a Garvin County man who was run over by a pickup truck while lying in the westbound lane of Oklahoma 29 east of Marlow.

Shane Andrew Bonner, 31, of Foster died just after 4:15 when he was hit by a pickup truck as it swerved to avoid another man who was standing in the eastbound lane, trying to flag down the truck.

Investigators were still trying to determine why Bonner was in the roadway.

A 21-year-old McAlester man also died Monday of injuries suffered in a Sunday night collision.

Chance Dwight Holden died at a Tulsa hospital after being injured when the car he was driving crossed the center line of Oklahoma 10 in Cherokee County and crashed head-on into an oncoming vehicle.

Eight people in the second vehicle were not seriously injured, troopers said.

Another Sunday night crash claimed the life of Linda Sue McCoy. 58, of Roff who died after her car ran off Oklahoma 1 near Sulphur and struck a row of trees.

McCoy was attempting to pass another car in a no-passing zone when she lost control and crashed, the patrol said.

Kevin E. Wheat, 34, of Mounds was also killed Sunday when the car he was riding in ran off an Okmulgee County road and rolled several times, ejecting Wheaton from the car, which then rolled over him, troopers said.

And a 3-year-old Texas boy and his stepfather died following a one-car crash on U.S 69 Saturday night in Pittsburgh County.

The OHP said Telmace Williamson, 36, of Ponder, Texas, was dead at the scene after the car he was driving ran off the highway and hit a bridge.

Williamson's stepson, Wesley Byles, 3, died later at a Tulsa hospital.

Three Highway Patrol troopers responded to the accident.