Use Freedom of Information and get a private investigator to delve into the funding of these humps and who actually pays for them. Often when this sort of thing is steamrollered through there's a financial reason, if you get my drift.

You could also take out an injunction against any tremors from the humps damaging your properties, demanding restrictions on the size and speed of vehicles using your road. And threaten to bill the council directly for any car suspension or tyre damage from these 'obstructions' placed in the roadway.