Abstract
The purpose of this article is to provide an overview of the trends in the Norwegian National Travel Surveys (NNTS) concerning quality. The analysis is based on a document analysis of NNTS documentation and quantitative analysis of 2016–2019 data. The quality of the NNTS has declined significantly over recent years. Probable causes are non-response due to refusal, underreporting of trips and geographical bias. The current approach does not provide a data that reflects the real travel behavior of the population. In the future, emphasis should be put on increasing the methodological awareness in all phases of the research design.
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