More than 11,000 fixed penalty notices were issued to motorists in just over the space of a month on a single street in Leeds city centre.
A new bus gate was introduced last year to make sure cars do not turn off Vicar Lane onto Lady Lane between 5am and 10pm, as part of work to improve roads for public transport in the city centre.
But it has now been revealed that a traffic enforcement camera on the corner of the two roads issued hundreds of thousands of pounds worth of fines in just 39 days for making the now-illegal manoeuvre.