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OCR for page 148
148 Ground Access to Major Airports by Public Transportation
Table 6-6. Primary markets associated with public ground
transportation services.
Size of primary
market for public Total annualized
mode origin/destination air travelers
Mode (square miles) (two-way trips)
Rail/Subway 60 - 90 6,600,000 - 8,200,000
Shared Door-to-Door 60 - 450 2,000,000 - 4,900,000
Express Bus (Regional) 275 - 550 1,200,000 - 1,600,000
Express Bus (Downtown) 4 1,300,000
Multistop Bus 75 1,000,000
SOURCE: TCRP Report 83, MarketSense.
to the role of public transportation modes in the family of ground transportation services needed
to support a large airport.
Defining the market conditions that support individual public transportation services
provides analogous models to use in planning new or improved services for airport ground
transportation markets.
Influence of Geography and Demographics
on Ground Transportation Markets
The previous section reviewed the relationship between geographic characteristics of the mar-
ket and the market's ability to support various modes of airport ground access, focusing on the
density of the trip ends at the non-airport end of the ground access trip. Building on that analy-
sis, this section examines the interaction of both elements of market research: identifying strong
markets in terms of geographic segmentation and demographic segmentation. Initially, the
analysis should identify the geographic area where a given service makes sense. Following that
assessment, the influence of demographic variables should be undertaken for the defined area.
The following example reviews the ground transportation markets in Washington, D.C. The
goal is to understand the influence of two separate factors--geography and demographics--on
the propensity to select public transportation services. Once geographic conditions are held con-
stant, it becomes possible to isolate the variation in market behavior stemming from the unique
characteristics of the four demographic segments.
Variation by Demographic Segment: Total Airport Market
As an introduction to examining the separate behavior of the separate market segments, the
ground transportation behavior at Reagan Washington National airport is assessed. Overall, 21%
of air travelers use public transportation services at Reagan Washington National and 12% use
rail. Focusing more narrowly on the public transportation modes at Reagan Washington
National, variations by market segment can be observed in Figure 6-4. For public transportation
as a whole, the non-resident non-business segment has the highest share, with the shared-ride
van capturing a considerably higher share than rail. For MetroRail, the strongest segment is
the resident non-business segment, with about 16% of the market share. In terms of rail usage,
the resident business traveler has a higher propensity to select rail than the non-resident busi-
ness traveler.
