HAHA, just easy way to fix your problem. Need to know the large area of buildings need more highway to moving.
With me, I used maximum 3 lanes to move the materials and always use the traffic circle for routing. You alway can pause the game and have the time for construction new buiding. Sometime I do that and make the rest time to enjoy to view attacker.
Do not use more 3 lane, keep your cost for create more house and support building, electric pole can sock the Worm and cheep to construction, maze of wall with zigzag block the worm and bomb, one house need one food production is the best.
And, I was finished all after few days :)))