I traveled to Illinois in June. It was a quick business trip. But, I did have an opportunity to meet the great staff of the Illinois Lincoln Highway Coalition: Bonnie Heimbach (Executive Director) and two of her staff (Mary Jo and Sue). You may stop in and visit them at 200 South State Street; Belvidere, Illinois 61008.
If you're traveling the Lincoln Highway in Illinois this summer, be sure to download their trip itinerary: http://www.americanroadmagazine.com/docs/itineraries/IllinoisLHCoalitionItinerary.pdf
and visit their website: http://www.drivelincolnhighway.com/