Travel Survey Process

The conduct of a survey is not an informal procedure. Rather, it should follow a series of logical, interconnected steps which progress toward the final end-product of the survey. The stages in a typical sample survey are shown below, and the issues to be addressed within each of these stages are then outlined. 

A.    Preliminary Planning
        (i)      Overall Study Objectives
        (ii)     Specific Survey Objectives
        (iii)    Review of Existing Information
        (iv)    Formation of Hypotheses
        (v)     Definition of Terms
        (vi)    Determination of Survey Resources
      (vii)   Specification of Survey Content

B.    Selection of Survey Method
        (i)      Selection of Survey Time Frame
      (ii)     Selection of Survey Technique
      (iii)    Consideration of Survey Errors

C.    Sample Design
        (i)      Definition of Target Population
      (ii)     Sampling Units
      (iii)    Sampling Frame
      (iv)    Sampling Method
      (v)     Sampling Error and Sampling Bias
      (vi)    Sample Size and Composition
      (vii)   Estimation of Parameter Variances
      (viii)  Conduct of Sampling

D.    Survey Instrument Design
        (i)      Types of Survey Instrument
      (ii)     Question Content
      (iii)    Trip Recording Techniques
      (iv)    Physical Nature of Forms
      (v)     Question Types
      (vi)    Question Format
      (vii)   Question Wording
      (viii)  Question Ordering
      (ix)    Question Instructions

E.    Pilot Survey(s)
        (i)      Adequacy of Sampling Frame
      (ii)     Variability within Survey Population
      (iii)    Estimation of Non-Response Rate
      (iv)    Size of the Pilot Survey
      (v)     Suitability of Survey Method
      (vi)    Adequacy of Questionnaire (schedule)
      (vii)   Efficiency of Interviewer Training
      (viii)  Suitability of Coding, Data Entry, and Editing Procedures
      (ix)    Suitability of Analysis Procedures
      (x)     Cost and Duration of Surveys(
      (xi)    Efficiency of Organisation

F.     Administration of the Survey
        (i)      Procedures for Survey Administration of:
      (ii)     Survey Execution and Monitoring
      (iii)    Quality Control
      (iv)    The Use of the Computer in Transport Surveys

G.    Data Coding
        (i)      Selection of Coding Method
      (ii)     Preparation of Code Format
      (iii)    Development of Data Entry Programs
      (iv)    Coder and Data Entry Training
      (v)     Coding Administration

H.    Data Editing
        (i)      Editing of Field Sheets
      (ii)     Verification of Data Entry
      (iii)    Development of Editing Computer Programs
      (iv)    Consistency and Range Checks

I.     Data Weighting and Expansion
        (i)      Editing Check Corrections
      (ii)     Secondary Data Comparisons
      (iii)    Corrections for Internal Biases

J.     Data Analysis and Management
        (i)      Exploratory Data Analysis
      (ii)     Model Building
      (iii)    Interpretation of Results
      (iv)    Database Management
      (v)     Provision of Data Support Services

K.    Presentation of Results
        (i)      Verbal Presentations
      (ii)     Visual Presentations
      (iii)    Preparation of Reports
      (iv)    Publication of Results

L.     Tidying-Up
        (i)      Documentation of Survey Method
      (ii)     Storage and Archival of Data
        (iii)    Completion of Administrative Duties

TUTI used this diagram, and the checklist of activities, in the design of surveys, in the monitoring of survey progress and in the documentation of the entire survey process.


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