The council has advised motorists to prepare to stop at school crossing patrols
Motorists in Cardiff who have been ignoring school crossing patrols have been warned they could face a Ł1,000 fine or disqualification if caught.
Cardiff council's road safety team said there had been a number of incidents where drivers had been reluctant to stop for lollipop women and men.
They said the problem was particularly bad if they were helping adults cross the road.
Motorists are required by law to stop for adults and children at crossings.
In January 2001 school crossing patrols were given the power to help anyone of any age across the road and not just children.
Under the Traffic Regulation Act 1984, if a driver does not stop when signalled to by a school crossing patrol, they could have three penalty points added to their licence as well as the fine and the potential to be disqualified.
Cardiff council's road safety team said it was important for motorists to realise the crossings helped adults as well as children.
"Motorists are reminded that when approaching a patrol they should always be prepared to slow down or stop," said a spokesperson for the council.
"Once the patrol raises the sign in a vertical position drivers must by law STOP.
"Drivers must then wait until the patrol has returned to the pavement before moving off."
Councillor Delme Bowen, executive member for traffic and transportation said lollipop men and women who provide the school crossing service should be thanked and respected.
"I would like to remind motorists that the lollipop sign should be treated in the same way as a red light," he said.
"Regardless of who is using the school crossing patrol service, stop means stop."