Accuracy and reliability

Overall accuracy

Information on the specific data processing can be obtained from The Road Directorate. For specific areas of the statistics additional information can be found at the Road Directorate's specific pages for Road Traffic, Road Infrastructure and Traffic counts respectively.

Sampling error

Information on the specific data processing can be obtained from The Road Directorate. For specific areas of the statistics additional information can be found at the Road Directorate's specific pages for Road Traffic, Road Infrastructure and Traffic counts respectively.

Non-sampling error

Information on the specific data processing can be obtained from The Road Directorate. For specific areas of the statistics additional information can be found at the Road Directorate's specific pages for Road Traffic, Road Infrastructure and Traffic counts respectively.

Quality management

Statistics Denmark follows the recommendations on organisation and management of quality given in the Code of Practice for European Statistics (CoP) and the implementation guidelines given in the Quality Assurance Framework of the European Statistical System (QAF). A Working Group on Quality and a central quality assurance function have been established to continuously carry through control of products and processes.

Quality assurance

Statistics Denmark follows the principles in the Code of Practice for European Statistics (CoP) and uses the Quality Assurance Framework of the European Statistical System (QAF) for the implementation of the principles. This involves continuous decentralized and central control of products and processes based on documentation following international standards. The central quality assurance function reports to the Working Group on Quality. Reports include suggestions for improvement that are assessed, decided and subsequently implemented.

Quality assessment

The statistics consists of three parts: Road Traffic, road infrastructure, and investments in roads.

Road traffic is based on odometer readings from road worthiness inspections and traffic counts. There is uncertainty on both sources and there is expected to be uncertainty on the overall traffic statistics.

Road infrastructure is based on administrative sources. There is only small uncertainty on the statistics related primarily to rounding off road lengths.

Investments in roads are based on public budgets and expenses. There is very little uncertainty on those data.

Data revision - policy

Statistics Denmark revises published figures in accordance with the Revision Policy for Statistics Denmark. The common procedures and principles of the Revision Policy are for some statistics supplemented by a specific revision practice.

Data revision practice

There is no preliminary statistics