If there is an increase in traffic after you have expanded the highway, you are going in the right direction. If it is levelling off, you have gone far enough.

If there is an increase in traffic after you have expanded the highway, you are going in the right direction. If it is levelling off, you have gone far enough. Then congestion will reduce. The argument that more roads do attract more cars just shows that we are still planning in a state of poverty. It is completely backwards. It is like saying "don't give the starving more food, they'll just eat more, and more starving will beg".