The five-day strike has disrupted fuel supplies across Greece, leading to long queues at petrol stations and has also affected businesses.
Greece's 33,000 hauliers stopped work on Monday to protest against government plans to slash the price of licences, a key liberalisation reform prescribed in a multi-billion euro European Union and International Monetary Fund bailout plan for the country.
Under the terms of the bailout, Greece must open up the road freight industry to competition by September and liberalise other closed professions, such as lawyers and architects, by June 2011.
The leader of the truckers union George Tzortzatos told reporters that 'we will not hold a funeral for our licences, we will fight with all our might to protect our property.'
Hauliers risk criminal prosecution and losing their licences after the government invoked emergency powers on Wednesday, citing public health risks from the lack of food, fuel and medicines delivered to retailers.
Officials have said the government would press ahead with sanctions.
A Transport Ministry spokeswoman said 'whoever refuses to go back to work will be arrested and deprived of his licence, Greek law will be fully applied.'
The truckers' decision to continue their labour action came as a team of EU, IMF and European Central Bank officials visited Athens to decide whether Greece has made enough progress in implementing the bailout plan to receive a second, €9bn aid tranche.
Road freight is one of the most closed professions in Greece with no new licences issued for nearly 40 years.
Those in circulation are sold from person-to-person for hundreds of thousands of euros.
