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Measuring the Benefits of Intercity Passenger Rail: A Study

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error cleaning used in this study appeared to increase <strong>the</strong> total per-item response rate by about<br />

two percentage points during both study periods. Second, <strong>the</strong> per-item response rate for most<br />

survey items (14 out <strong>of</strong> 23 in total) could not be improved from <strong>the</strong>ir original rates. The review<br />

and cleaning discussed in prior sections only addressed a few items on <strong>the</strong> survey, yet <strong>the</strong>se<br />

items were important.<br />

Table 4-6: Comparison <strong>of</strong> Per-Item Percent Response Rate, Raw and Final Data Sets<br />

Survey Item<br />

April (435 Surveys)<br />

Raw Final<br />

July (588 Surveys)<br />

Raw Final<br />

Boarding Station 96 100 94 100<br />

Access Travel Mode 95 99 96 99<br />

Access Time 94 94 94 94<br />

Access Miles 43 43 38 38<br />

Alighting Station 97 100 98 100<br />

Egress Travel Mode 94 98 94 99<br />

Egress Time 89 89 89 89<br />

Egress Miles 27 27 25 25<br />

Trip Purpose 83 88 85 89<br />

Alternative Travel Mode 93 95 94 95<br />

Round-Trip Today 98 98 98 98<br />

Trip Frequency 94 97 93 97<br />

Reasons for Choosing <strong>Rail</strong> 72 91 65 93<br />

Nights Away from Home 93 93 94 94<br />

Spending on Trip 98 98 92 92<br />

Residential Zip Code 97 97 96 96<br />

Gender 98 98 97 97<br />

Age Group 98 98 97 97<br />

Party Size-Adults 89 89 86 86<br />

Party Size-Children 94 94 94 94<br />

Employment Status 95 97 89 92<br />

Household Vehicles 98 98 95 95<br />

Household Income 89 89 85 85<br />

All Survey Items 88 90 87 89<br />

The following items had a response rate <strong>of</strong> less than 90 percent after <strong>the</strong> quality control:<br />

• Access/Egress Miles: These items had <strong>the</strong> lowest response <strong>of</strong> all <strong>the</strong> items on <strong>the</strong> survey,<br />

with response rates for access miles around 40 percent and egress miles less than<br />

30 percent. This was not a major issue as <strong>the</strong> survey did not specifically request <strong>the</strong><br />

number <strong>of</strong> miles be reported; ra<strong>the</strong>r, it was given as an alternative to travel time for<br />

88

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