A road rage incident on I-84 is under investigation.  State Police received a call from a motorist Monday morning about an erratic driver who allegedly threw objects at his vehicle.  The driver was headed eastbound shortly before 8am around exit 10 when a black four-door Chevy sedan approached in his lane at a high rate of speed.  The other driver reportedly threw objects at his vehicle before getting off the highway at Exit 11.  The described as a young light-skinned male with a close-cut brown or light brown haircut.  A license plate number was provided, but the owner denied driving the car and didn't provide further information.