City Hall hit its daily parking revenue target of Sh2 million in a crackdown that sought to curb collusion between its workers and motorists.
The operation led by senior executives involved clamping vehicles without payment receipts in the CBD, Westlands and Industrial Area.
County secretary Robert Ayisi, all chief officers and the revenue enforcement team combed the streets looking for suspected non-payers.
John Ntoiti, the head of revenue enforcement team, said the operation was necessitated by parking revenue going down or remaining stagnant.
City Hall automated parking fees collection to stem revenue leakages, but collusion between motorists and employees saw car owners avoid paying the Sh300 fees.