Red routes, signs and bays are being reviewed in more than 400 locations across London after motorists complained of being wrongly fined.
Transport for London (TfL) said ticketing on many locations were suspended after some places garnered 4,000 tickets in less than two years.
TfL has paid thousands of pounds in refunds to those who complained, agreeing that signs were "confusing".
Campaigners called on TfL to refund all drivers who were fined at those spots.
Jonathan Barr, an estate agent, was fined while unloading his car at a loading bay in Falloden Way, one of the top 10 spots in the TfL list.
About 4,000 tickets have been handed out there in the past 18 months.
TOP 10 'CONFUSING' ROADS
Falloden Way/ Market Place loading bays
Parking Bays outside 433 Bromley Road
York Way parking bays
Shoreditch High Street
Kidbrooke Park Road
Stanstead Road bus lane
Camberwell New Road bus lane
Osborn Street (Whitechapel box junction)
Lewisham Way/ Parkfield Road
Mr Barr, who got a refund, said: "It's outrageous. We've got enough pressures as it is."
Graeme Craig from TfL said: "I am keen to understand where we are issuing PCNs (Penalty Charge Notices) and keen to understand if the reason why we are issuing high numbers of PCNs is because individual drivers are confused."
TfL said they had already refunded £24,000 to motorists who complained at the time.
But Neil Herron from campaign group Parking Appeals is calling for refunds for all motorists who were fined in the areas under review.
"Put your hands up Transport for London and give everybody the money back...The law is a two-way street."
Campaigners want fines wrongly given on red routs refunded
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