The President of the Irish Road Haulage Association has described some elements of the Department of Transport's traffic management plan, if Brexit border controls lead to traffic jams, as "nuts".
Speaking on RTÉ's Drivetime, Eugene Drennan said plans to stack 750 lorries at motorway service stops, roads and in emergency lorry parks if Brexit checks end up closing Dublin Port, was "cracked" and "for the birds".
The association is calling for a single entity to take charge of the free movement of traffic from ports ahead of Brexit.
Drivers will face checks from Revenue, the Department of Agriculture, the Health Service Executive and An Garda Síochána.
Mr Drennan said the beginning of January will be a huge learning curve and they will need all hands on deck to make this as smooth as possible and keep the wheels rolling.
He said minor customs checks to be completed within three to five minutes as the current plan is too long and "needs to be more streamlined".
He called for ferries to run at slightly staggered times, which would ease congestion.
Mr Drennan said hauliers are the main users of Dublin Port and they were not consulted about how the traffic plan would work.
Meanwhile the Chairperson of the Transport and Communications Committee said that the establishment of a ferry booking in Dublin Port, which exists in Cork Port, would speed up the system and hauliers could book before they arrived.
Speaking on the same programme, Kieran O'Donnell said the issue of staggered ferry times were raised with Dublin Port Authority and they said they discussed this with the ferry companies and these were commercial decisions and commercial operations.
He described the transport aspects around Dublin Port when Brexit happens on 1 January as "worrying".
Mr O'Donnell said the committee has asked that Dublin Port engage directly with the hauliers to see what can be put in place to ensure some smooth transition.
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