Leeds City Council has collected more than £2m from motorists illegally driving in bus lanes since installing cameras last year.
Between August 2011 and October 2012, the local authority has received £2,092,827 in fixed penalty notices after drivers clocked up a total of 70,885 offences. The council said the scheme had reduced offences by 74 per cent since its launch, meaning improved traffic flow for public transport users.
It said the number of motorists caught illegally driving in bus lanes had fallen from 3,572 in the first week after the cameras were installed to just 930 in the last week of October this year.
Under the scheme, vehicles seen illegally using bus lanes or bus gates are photographed and drivers sent a £60 penalty charge notice, reduced to £30 if paid within 14 days.
A council spokesman said all surplus cash from the scheme was ring-fenced for highways improvement such as pedestrian crossings, new bus lanes and traffic calming.