October 23, 2019: An interpretive panel about Henry Ostermann, a Lincoln Highway Association official who died in a car accident east of Montour, was placed in Tama County in 2019.
A press release from Prairie Rivers of Iowa (linked here via Tama-Toledo News) says the group has received an award from the National Scenic Byway Foundation for its interpretive panels on the Lincoln Highway Heritage Byway. Prairie Rivers has set up 20 panels on the route so far.