They say French police have given up trying to deal with gangs of up to 100 migrants who surround lorries and demand passage across the Channel under threat of violence.
The situation is so bad they want the British Army to be called in to help protect the drivers.
Many have been verbally abused or physically attacked and one needed hospital treatment after being kicked and punched by an angry mob.
I am convinced a lorry driver will be killed soon, probably stabbed
Haulage boss Kevin Hopper said: “I am convinced a lorry driver will be killed soon, probably stabbed.”
Driver Tommy Harrison at the firm based near Wakefield, West Yorkshire, was ambushed by a gang in Calais.
He said: “One of them pulled a knife on me while others climbed up on top of the cab and cut a hole in the curtain to get inside. It was very frightening.
“There was very little I could do. About 10 of them got in. It’s hopeless going to the gendarmes because they don’t want to know, so I drove to a lorry park where I knew there would be other drivers and we got them out.”
Tommy, of Redditch, Worcestershire, said: “I could have been stabbed or beaten up. It is the same risk for all drivers going through Calais.
“The mayor got rid of the camps there. Now they’re hanging around service stations well away from Calais, anywhere where lorries have to stop. No one is helping them in France so they sleep rough and are starving. It makes them even more desperate.
“The French have given up and actively urge them to get on the lorries and go to England. They just want to pass the problem on to us.”