Airports are extremely important to the growth of America. More and more goods are transported by air and there continue to be more business travelers (crowded of course).
Most airports can’t grow and are far out of the city. They are severely restricted in the volume of flights they can handle because of environmental regulations. Most regulations are absurd. A teeny fraction of the San Francisco Bay cannot be filled in for more runways. No matter what. It is not rational it is religion.
I see a temporary solution for most airports.
Because private business jets are becoming a much larger segment of our landings and take-offs, they are interfering with commercial passenger flights.
Since these much smaller planes, need a fraction of the landing space, we should dedicate group of taxi strips to their usage.
Taxiways and main runways are handled by different air traffic controllers. Modest changes need to be made in control rules.