I've asked our traffic team to check into this -- it may be something is out. It does seem odd that Conway would be getting the most green time. Thanks for sharing the observation. Andrew Gates, MoDOT Communications
We currently have a project tentatively scheduled for Route D from the city limits to Tucker set for fiscal 2024. Andrew Gates, MoDOT Communications
Trash collection (to include sweeping) is one of the department's higher priorities. We have spent more than 35,000 hours so far this year collecting debris along the roadways. Due to the pandemic, many of our partners (Adopt a Highway and Sponsor a Highway, and the incarcerated crews) have had to reduce the time they spent on the roadways. We are hoping that future years will see an increase in efforts from those partners as we move forward, as well. Andrew Gates, MoDOT Communications
We can certainly take a look at it and share it with the appropriate responsible organization. Andrew Gates, MoDOT Communications
You are definitely very welcome. I think I speak for all the participants answering questions that we appreciate the opportunity to hear from our customers, share information where possible and address concerns that come up, Andrew Gates, MoDOT Communications
We currently have no near-future improvement plans scheduled for this section of Hanley Road. David Wrone, St. Louis County's Department of Transportation
We do indeed have an improvement project planned for this section of Ballas. Work is expected to begin next spring or early summer. David Wrone, St. Louis County's Department of Transportation

Your question covers several jurisdictions (i.e. MoDOT maintains Manchester, and the County maintains Hanley and Brentwood), so the answer will be a very general one. Some work (like the work along Manchester) is due to on-going or planned construction, but work other than that (or water main breaks) would typically be the result of the utility company performing maintenance they need to on their system. One can easily suppose that similarly aged utilities would probably need the same general type of updates or maintenance at the same time -- you might reach out to the utility companies for specifics on the types of work they are doing. Any utility work on the roadway is done under permit, and one of the requirements for permits is that the roadway is supposed to be returned to its former condition. That may take some time (due to contracting requirements, ensuring the repair doesn't cause other nearby issues, and the like) but our team (as does the county and city) does work with the utility company through that process. Andrew Gates, MoDOT Communications