Okay so, super fun tip from a Midwesterner:

Black ice isn't actually a thing. It's literally just ice you didn't see plus people generally driving way too fast for current weather conditions. The roads likely will be treated at that point but still use your brain and drive carefully, don't slam on the brakes and be mindful that bridges and other higher elevation spots freeze first and often.

If it's dry by the time you drive, you're probably good since the salt will stick and do it's job on treated roads.