Michael J. Coleman, 22, is missing from Schaumburg, Illinois.
He left his home Tuesday morning to go to a business meeting in Schereville, Indiana, but has not been heard from since.
Police said his I-PASS showed he went toward the northwest, but there were later I-PASS contacts that were "unexplained."
Coleman may be in the vicinity of the south Chicago suburbs or northwest Indiana.
Coleman is driving a 2005 gray Mazda 4-door with license plate BHWK7. He is 6'3" tall, 190 pounds with brown hair and brown eyes.
If you have any information about his whereabouts, please call 847-882-3534.