SAPULPA, Okla. — Oklahoma Highway Patrol troopers say an elderly man in a van was killed about noon Wednesday eastbound on the Turner Turnpike near Sapulpa.
Troopers say the driver was trying to avoid a concrete riser that fell off a flatbed trailer and shattered on the turnpike.
The driver was killed when he slammed into the semi.
Troopers are looking for witnesses to come forward.
The eastbound lanes were closed.