England's traffic chaos

A short trip to England has found me caught up in traffic jams in Truro, Southampton and for mile on end on the M6. I'm sure the scene is familiar all over the country with rush hour jams and three lane motorways full to overflowing with traffic, much of it commercial heavy lorries. I'm tempted to ask what will the roads be like in five or ten years with more and more cars and articulated lorries on the road. Has anyone any idea? Do the department of Transport know? Is there a plan such as making vehicles numbers with odd registration numbers able to use the roads on Mondays, Tuesdays and Wednesdays. Or are they just hoping for the best?