Members of Australia's largest women's organisation will lobby the NSW government to ban vehicles with offensive signage from the state's roads.
The Country Women's Association of NSW passed a motion at its state conference earlier this month calling for vehicles with slogans promoting sexism, racism and violence to be outlawed.
CWA members are particularly concerned about slogans on Wicked camper vans which have sparked controversy around the country.
The vans in the past have had artwork referring to anal sex and virginity, for example.
CWA NSW president Stephanie Stanhope said the slogans were "way out of step with community standards".
"It's time every state took a stand on these unacceptable slogans and organisations like ours supported the changes necessary to eliminate this kind of disrespect from our communities," Ms Stanhope said in a statement on Monday.
"When statements and slogans degrade people and cause an enormous amount of offence, then it's time to act."
Queensland and Tasmania have given motor vehicle registries the power to deregister any vehicle that doesn't comply with Ad Standards rulings.
The CWA would like to see similar legislation passed in NSW. It would also welcome federal action to introduce a uniform approach.
The NSW Greens in 2017 called for legislation to ban offensive language on cars but the state government instead reached an informal agreement with Wicked.
A Transport for NSW spokesman said at present there are no Wicked Campers registered in NSW.
"If necessary, and in the interests of consistency, the NSW government would consider adopting the approach recently introduced by the Queensland government to regulate these types of vehicles if they are ever registered in NSW," the spokesman said in a statement.
Wicked has been able to dodge fines and penalties by changing vehicle registration to another jurisdiction once a complaint has been made - a loophole which a national scheme would close.
Wicked Campers has been contacted for comment.
© AAP 2019