If you see rubbish which has been fly-tipped, it is easy to report this to Mid Suffolk District Council on their website. Just follow this link:
https://www.midsuffolk.gov.uk/environment/street-care-and-cleansing/fly-tipping/
If you see damage to road signs, or potholes, or any other highways problem, report it to Suffolk County Council by following this link:
https://www.suffolk.gov.uk/roads-and-transport/highway-maintenance/report-a-highways-issue/