Dirty nappies and broken bottles were among a “disgusting” pile of rubbish dumped in the middle of the road.
Police discovered the mess near Pidley while carrying out patrols in the early hours of April 25.
@CambsRuralCops tweeted: “This is not only a huge hazard but a disgusting one too.”
Two units and highways officials were alerted to clear the scene.
Residents expressed their anger on social media, with calls for recycling centres to be reopened in the district.
One comment read: “It’s disgusting but this will happen when the tips are closed. If it’s good enough for the bin men to work surely a safe way can be found to run the tips.”
Another person added: “So lucky you came across this because it could have ended really badly. “Why at all, but why right in the middle of the road?”