Looks like NJ is resuming their inmate trash collection program. May be hope for PA (haven't looked that up yet) https://www.state.nj.us/transportation/uploads/comm/news/details/comm_np_20210503_161932_NJDOTInmateLitterandAdopt-A-HighwayProgramsbeginasLittercampaigncontinues.pdf

Can't find anything official about PA, just this one complaint letter to the editor https://www.lehighvalleylive.com/opinion/2023/02/a-drive-down-route-33-is-all-it-takes-to-see-the-littering-problem-on-pas-highways-letter.html