Twelve people have been issued with fixed penalty notices since the new policing power was implemented at 9am on Friday, November 27, 2020.
A further 15 people were warned and instructed to leave Cardiff.
Those travelling in breach of COVID legislation included a couple travelling from Essex who told officers they were headed to the Capital to give family Christmas presents, and a group of nine people who were travelling in convoy to visits friends in University.
A total of 110 vehicles were stopped by police in the first 24 hours of the operation which aims to ensure those visiting Cardiff city centre are doing so within the confines of coronavirus legislation.
Powers to conduct vehicle checks were afforded to police officers by Welsh Government, under regulation 33 of the Health Protection (Coronavirus Restrictions) and they are available to officers working in Cardiff until 5pm on Sunday, November 29.
Cardiff and Vale of Glamorgan Chief Superintendent Wendy Gunney, said: “I would like to thank the vast majority of people who are enjoying their weekend with caution and within the confines of the existing regulations, but those not adhering to the rules are continuing to put others at increased risk.
“The measures which are in place are in place for a reason. Our checks will continue throughout the weekend, and anybody blatantly flouting the rules, which have been made very clear, face being fined,” she added.
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