This chapter shows how a transport survey can be adapted to meet the objectives of its specific task, by careful attention to its initial planning and design. The main stages in the design and conduct of a transport survey are listed. First, it is necessary to consider the objectives of the survey. The information requirements are then specified, including how far they can be met from existing data or need further data collection. The survey planner must next define the survey instrument and choose the most appropriate survey techniques to use. The design of the sampling strategy is closely associated with stating the experimental hypotheses and the relevant variables; it includes defining the sampling units, the target population, the sampling frame, the sampling method, and the sample size. The survey can then be planned; its plan should contain a detailed schedule of all the procedures and stages required for implementing the survey and producing reports. A 'cross-sectional survey' is designed to obtain a picture of the system state at a specific time. A 'time series survey' provides a picture of the system's evolution, and requires a series of repeat surveys or continuous monitoring. The training and motivation of staff, and the survey's administration, are briefly discussed. For the covering abstract, see IRRD 892228.
Samenvatting