Stops were carried out on Union Street, Jennycliff and Madeira Road
41 fines have been handed out and eight illegally-modified cars have been taken off the road, during a crackdown on antisocial driving in Plymouth.
Officers also made three arrests during the six hour operation on Saturday (11 July), and issued numerous formal and verbal warnings across the city as part of Op Alloy.
The initiative ran from 6pm to midnight and was prompted by complaints from residents and councillors.
Stop sites were in Madeira Road, Union Street, Stonehouse Street, and the Coypool and Jennycliff areas, and offices have warned it was not a one-off.
Of the 41 fines handed out, five were for speeding, eight for number plate issues, and six for vehicles deemed to be in a dangerous condition.
Four drivers had no insurance, six were not wearing seatbelts and one had no licence.
Fines were also given to motorists using mobile phones, ignoring double white lines and one-way systems, and for cars with exhaust and lights defects.
Two people were arrested on suspicion of drink-driving and another on suspicion of driving while under the influence of drugs.