A deal was finally reached between unions – including PSI affiliates UGT-FSP and CCOO-FSC, and private companies that employ street cleaners, on 17 November.
Under the agreement hammered out in marathon talks, the companies agreed not to fire any workers in return for the employees accepting temporary unpaid lay-offs.
Madrid is under pressure to cut public service costs at a time when the whole country faces a strict austerity drive.
The strike led to surreal scenes on the streets of Madrid; mounds of rubbish grew high while collection services were suspended in the labour action. However, the city was quickly restored to normal when the strike ended.
"The workers approved the agreement by an absolute majority," said the CCOO labour union in a statement.
The Madrid unions' story (in Spanish)