> Yes and then more cars appear. This is after those cars appeared. > The geometric realities are such that induced demand can only be satisfied by growing th

> Yes and then more cars appear. This is after those cars appeared. > The geometric realities are such that induced demand can only be satisfied by growing the size of the road network. We are explicitly referring to increasing the capacity of the road network without growing its size. > s soon as any efficiencies open up free road space the amount of cars will simply increase, quickly closing that free road space again. Again, we're not looking to increase free road space, the additional cars filling that space are the benefit. There is some absolute limit on throughput where the road is completely packed full of cars all moving at maximum speed, and the only way to further increase throughput is expansion. But most road networks are no where near that limit. When you are in bumper to bumper traffic on a 60 mph highway moving at 5 mph, that road is carrying about 1/12th or 8% of its maximum capacity. That's an immense opportunity for improvement.