Drivers claim they are having to drive over more than 1,000 humps

The drivers say "mini Everests" on the Green Park industrial estate in Reading could cause back injuries and that passengers have also been complaining.

They want the council to replace them with smaller traffic calming measures as soon as possible.

Supported by the Transport and General Workers Union, they will now pursue plans for a full ballot on the issue.

Losing patience

The 10 double-decker drivers believe "speed cushions" positioned in the middle of the traffic lane would reduce motorists' speed and discomfort.

A Transport and General Workers Union spokesman said they were assured the matter would be resolved by March at a meeting with Reading Borough Council representatives earlier this year.

He added: "My experience is that this is the first time we have dealt with anything approaching industrial action over road humps."

Arrangements are now being made for an external group to be brought in by the TGWU to hold a formal vote.

John Howarth, Reading's transport chief, said: "Yes, there were assurances given and they were not carried out by council staff and I have made it very clear that I'm not very happy with the situation."

Tony Page, chairman of the council-owned Reading Buses, said: "I have no problem with the men for rattling our cage - I would have done the same in their position, but the work will be done."