The chamber of commerce here's calling on the Infrastructure Minister to reverse street parking price hikes in Newry.
It follows last week's announcement that the price would jump by 50%, from 40p per hour to 60p.
The changes will take effect from next month.
On-street parking in Belfast and Lisburn are also set to increase.
Newry and Belfast chambers of commerce, retail union NIIRTA and Hospitality Ulster are jointly against it.
In a statement they said the incoming Infrastructure Minister must "rethink" this "unnecessary burden on shoppers".
Mike Nesbitt to step down as UUP leader
Whole island of Ireland under weather warning as wintry conditions sweep
Bid to bring historical treasures from birth of US to Belfast for exhibition
Police investigating Arson Attack in North Belfast
McIlroy honours omission came despite Stormont nomination