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Should the federal government invest heavily in expanding American airports to relieve congestion?


Airport congestion, and ensuing nationwide delays, are disruptive to travelers and to the American economy. The federal government is capable of awarding grants aimed at bolstering our nation’s airports. But is that the best way to improve airports for most travelers?

Congestion and delays often start at high demand airports with limited runway capacity and become national problems because they have ripple effects across the country. But runway capacity issues are actually limited to only a few U.S. airports. The three airports in the New York City region, Washington Reagan National Airport, San Francisco International, and Los Angeles International are the only airports that need substantial increases in their runway capacity in the short term.

In fact, most airports are seeing fewer flights than 10 years ago, as shown in Figure 1. Of the top 50 busiest airports in the United States, only eight increased their domestic departures in the past decade. While passenger traffic is up at more than half of these airports (not due to airlines flying fewer flights but larger aircraft), the need for new runways, which is the most expensive capital investment an airport can make, is actually decreasing.

Figure 1. Total number of scheduled departures at small, medium, and large hubs (2005-2016).

Source: Bureau of Transportation Statistics, “Airport Snapshot,” U.S. Department of Transportation, 2017.

Since 2011, airports have reported a 40 percent reduction in capital investment needs. Figure 2 shows the unfunded investments such as regular maintenance, improvements in safety, and capacity expansions continue to decline (terminals and access to the airports are not included in these estimates).

Figure 2. Unmet airport capital investment needs in billions of constant 2016 dollars (1980- 2015). Values in each column represent the purported needs for the following five years.

Source: Federal Aviation Administration, “Report to Congress – National Plan of Integrated Airport Systems (NPIAS) – 2015-2019,” U.S. Department of Transportation, 2015.

Three main factors explain why unmet airport investment needs are decreasing.[5] First, some airports might have capacity expansions that are beyond their five-year horizon, and therefore are not included in this estimate. Since the budget figures submitted to the FAA only measure capital needs for the next five years, any project expected to start after that period is not captured.[6] Second, the FAA has been working more closely with airports to assess their true needs. Between the 2013 and 2015 reports, airports removed 1,600 out of 19,000 projects that were deemed not feasible.[7] Finally, airports are handling fewer commercial and general aviation planes, meaning less need for capacity expansions.[8]

Regardless, $34 billion in unmet investment needs is a daunting number. However, less than half of that is for improvements at the nation’s busiest airports. Table 1 shows that among large, medium, and small airports, where 97 percent of all passengers fly, $15.5 billion in new investment is needed.