A woman working as part of a roadside tree removal crew was killed yesterday in a multi-vehicle crash on Route 422 in Armstrong County, state police said.

Lauri A. Woodrow, 49, was loading tree branches into a wood chipper on the closed right lane of westbound 422 when a car slid into her and she was thrown under the wood chipper.

The crash happened about 2:30 p.m. when a car driven by Shawn L. Bachman, 31, of Cabot, was stopped and waiting to turn left on Mushroom Farm Road, police said. A sport utility vehicle driven by Michael S. Johnson, 20, of Grove City, stopped behind the Nissan.

A truck driven by Christopher Peters, 31, of Saegertown, hit the SUV, which was propelled into Ms. Woodrow, who was pronounced dead of blunt force trauma, according to Armstrong County Coroner Robert Bower.

Mr. Johnson and his passenger, Edward T. Zalewski, 19, of Downingtown, were injured; so was Mr. Bachman. The crash remains under investigation.