Rounding of Arrival and Departure Times in Travel Surveys: An Interpretation in Terms of Scheduled Activities

PIET RIETVELD* Vrije Universiteit

In travel surveys, most respondents apply rounding of departure and arrival times to multiples of 5, 15, and 30 minutes; in...

Figure 2 - Distribution of Arrival Times

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Figure 1 - Distribution of Departure Times

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Table 4 - Probability (%) of Actual Departure Time (n = 8,.,22) Given a Reported Departure Time of m = 15

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Table 1 - Probability of Rounding the Actual Time of Departure m by a Respondent to the Nearest Multiple of 5, 15, 30, or 60 Minutes (below or above m), or to m Itself

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Acknowledgements

Norman Y. Mineta Secretary

Michael P. Jackson Deputy Secretary

Ashish K. Sen Director

Rick Kowalewski Deputy Director

Susan J. Lapham Associate Director for...

Table 1 - Summary of Data Analysis Adopted for the 1990 and 1995 NPTS

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Table 5 - Elasticity of Time with Respect to Capacity

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Figure 1 - Activity Duration Calculations

Table 3 - Summary of 1990 Time Use for Different Characteristics of Individuals

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