Demolition teams are due to return to the French port of Calais to dismantle more makeshift shelters in the migrant camp known as the "Jungle".
The BBC's Anna Holligan in Calais says that migrants, under cover of darkness, tried to access lorries on the motorway heading towards the port.
French authorities believe about 1,000 migrants will be affected by the eviction plan while aid agencies say the number of people living there is much higher.
Officials say migrants can either move into converted containers in the northern sector of the camp, where there is room for 1,500 people, move to similar accommodation centres elsewhere in France or claim asylum in France.
