Treat Williams, a veteran actor who played leading roles in the TV drama “Everwood” and the movie “Hair,” based on the musical, has died following a road accident in Vermont, police said in a statement. He was 71.

The collision involving an SUV and Williams’s motorcycle happened about 5 p.m. Monday on Route 30 in Dorset, state police said. Williams suffered critical injuries and was airlifted to a hospital in Albany, N.Y., where he was pronounced dead, according to the statement. The crash is being investigated.