CourseWare Table of Contents    DATA COLLECTION

INTRODUCTION

DATA COLLECTION

The Sequence of Activities in the Data Collection

How the NPTS Data Were Collected
NPTS Flow Chart of Survey Events
Data Collection Procedures
Advance Letter To Households
Travel Day Assignment
Travel Diaries
Call Back Period
Response Incentives
Household Roster of Trips
Confirming Zero Trips

An Example of How a Household Participated in the Survey

Typical NPTS Household Example

What Data Were Collected?

NPTS Core Data
Travel Period
Segmented Trips

Simulated Interviews to Provide Examples of the Data Collection Process

Simulated Interviews

The Sample Design for the Survey

Sample Design
Overview
Sample Stratification
Target and Final Sample Sizes at the National and Add-on Levels

Points to Remember

Points to Remember

DATA FILES

MAKING IT USEABLE

ANALYSIS

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