Milwaukee has the typical bus system with routes for specific travel points, going back and forth all day, but it also had a Freeway Flyer system that took people from outlying area parking lots to downtown. The Freeway Flyer was recently discontinued because of a lack of passengers- these carried people who worked in offices, students and restaurants/bars/etc- it really saved a lot of time vs surface street routes. I'm not sure if it will return, but it will really cause a burden for many who would have taken is pre-COVID.