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Measuring the Benefits of Intercity Passenger Rail: A Study

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Future research can also focus on improving <strong>the</strong> data collection and analysis<br />

methodology processes. The state <strong>of</strong> practice would definitely be improved if a formal sampling<br />

plan could be developed that allowed for <strong>the</strong> estimation <strong>of</strong> variance and <strong>the</strong> resulting inferences<br />

that can be made about <strong>the</strong> population while also acknowledging <strong>the</strong> need to optimize studyrelated<br />

costs. Innovative survey approaches, such as a two-part form (hand-in and mail-back) or<br />

<strong>the</strong> use <strong>of</strong> electronic “tablet” devices for <strong>the</strong> tabulation <strong>of</strong> passenger responses might also be an<br />

area for future study. Future surveys might also focus on obtaining more detailed origin and<br />

destination information, to develop a database <strong>of</strong> passenger information with increased<br />

geographic precision. This would allow for a more refined estimate <strong>of</strong> a route’s market area.<br />

Finally, future surveys should take special care to identify passengers on a survey run who have<br />

already participated in <strong>the</strong> study and consider how <strong>the</strong>se passengers might be accounted for in<br />

<strong>the</strong> total population <strong>of</strong> ridership without requiring <strong>the</strong>m to complete a second survey form.<br />

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