Waupaca police have now released the names of the two men involved in a crash on U.S. Hiway 10 Monday afternoon. Lieutenant Geoff Johnson says the driver of the semi that slammed into the back of a Waupaca County hiway truck was 48 year old Eric J. Hollfelder. The Waupaca County Hiway Department employee in the truck was 43 year old Simon A. Blanton of Amherst. Both suffered non-life threatening injuries. The county truck was in the right lane of hiway 10 near the State Hiway 22 interchange, with emergency lights activated, and a flashing arrow directing traffic to the other lane, while hiway workers were performing routine maintenence. Hollfelder’s semi failed to move over and crashed into the truck. Lieutenant Johnson says no citations have yet been issued, as their investigation in the accident continues.