Wellington's mayor is considering taking the city's bus lanes back to the drawing board

People driving in bus lanes are Wellington City Council's biggest money grabber, raking in around six million dollars in fines.

A new bus lane on Cambridge Terrace caught tens of thousands of people exceeding the 50 metre maximum, worth a penalty fee of 150 dollars.

Andrew Little says he doesn't want bus lane cameras to be seen as a source of revenue for the council.

He says there's a genuine question on whether they need to be designated bus lanes for 12 hours a day seven days a week.