Will County has recently started officially signing the county highways, at least in my part of Will County. There are now signs along Naper-Plainfield Rd (Hwy 14), Weber Rd (Hwy 88), Hassert Blvd (Hwy 66) and Kings Rd/95th St (Hwy 89).
Is this something the state has told the counties to start doing? Kendall County did their highways last year.
Some of these should be extended to a more logical end even if the jurisdiction is a municipality. For instance, Hwy 89's designation ends after the bridge over the DuPage River instead of ending at Boughton Rd.
A number of these could also be consolidated into a single number.
For instance, Arsenal Rd (Hwy 17), Manhattan-Monee Rd (Hwy 6) and Crete-Monee Rd (Hwy 21) could be one number simply by cosigning with US 52 and Illinois 50. Wisconsin does this with their county highways.
Here is the Will County Highway Map for reference.
https://www.willcountyillinois.com/County-Offices/Economic-Development/Division-of-Transportation/Highway-System