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Traffic disruption is expected in Dublin on Monday as a truck drivers get set to protest for the second time in a month.
They are calling for the cost of fuel to be reduced.
Posts on a page called the 'Irish Truckers and Haulage Association Against Fuel Prices' claim thousands of vehicles will be involved in the protest in the capital.
They say it will be different to the last rally in November and "a lot more effective".
They have asked drivers to bring an overnight bag with food and water, as the action is planned to "last more than 24 hours".
The Irish Road Haulage Association says the group's tactics are "not the way to do business".
Retail Excellence Ireland says the disruption to a key shopping day before Christmas will put livelihoods at risk in its sector.
Fine Gael councillor David McManus says blockading traffic is not fair to the general public.
"Unfortunately this protest has been planned to cause maximum disruption to commuters trying to get to work.
"The organisers clearly haven't learnt their lessons from last time, because the people who will suffer from this protest are the sick and the vulnerable who will be missing their vaccine and hospital appointment.
"They're going to be the collateral damage from this protest.
"There's no reason why this protest can't start at 10am and outside Government Buildings, like lots of other protests.
"To have it at 7am on our motorways is misguided and completely pointless."
Gardaí are urging people to cycle or walk to avoid getting snarled up in traffic jams – or to take public transport if they can.
Business group DublinTown claims the 'nuclear button was pressed' on a the protest, before serious negotiations took place.
Its CEO Richard Guiney told Newstalk Breakfast: "There's a lot of jobs on the line, a lot of businesses that are struggling.
"I suppose the question is what negotiations and what discussions have taken place before there's such a protest like this?
"I think leadership involves having discussions and showing leadership before you press the nuclear button.
"And it does look like the nuclear button was pressed before the serious negotiations took place.
"Fuel prices rise, they fall - everybody knows that - we've all seen it in our electricity bills, for example.
"There's discussions to be had with retail groups; I'm not aware that any of those have taken place in terms of how costs such as this can be brought into the overall cost process".