Parking inspectors are doubling down on drivers who leave their cars in bike lanes in the city.

Twice as many cars were booked in the last month as a result of the clampdown, according to statistics from the City of Melbourne.

"The increased focus on vehicles stopping in designated bike lanes has resulted in a doubling of infringements issued from 175 in May to over 350 in June," a spokesperson for the city said.

The tough approach has come from the top down after Lord Mayor Robert Doyle said in June that businesses that illegally parked would be exposed via social media.

The fine for illegally parking in a bicycle lane is $155. Vince Caligiuri

The "name and shame" approach was essential for maintaining safety for cyclists and traffic flow, he said.

The fine for illegally parking in a bicycle lane is $155, with June's push resulting in $19,375 in extra revenue for the City of Melbourne.

The issue has long been a bugbear of cyclists, with the Bicycle Network previously urging bike riders to report offending.

"Our aim is for drivers to stop using bike lanes as a drop-off point or parking area, and choose the legal parking options available to them," a spokesperson for the City of Melbourne said.

"A positive change in driver attitudes requires a long-term approach which we are committed to."