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Joint Research Center (JRC)
VeSTEM

Vehicle Safety Technology Effectiveness Model

TransportTransportcosts and benefitssafety measuresroad collisions

Quality & Transparency

Quality

Model uncertainties

Models are by definition affected by uncertainties (in input data, input parameters, scenario definitions, etc.). Have the model uncertainties been quantified? Are uncertainties accounted for in your simulations?

yes
Input parameters having a relatively high associated uncertainty were identified and given upper and lower bounds of variation. These were used to calculate variation in the BCR (from absolute lower BCR to absolute upper BCR).

    Sensitivity analysis

    Sensitivity analysis helps identifying the uncertain inputs mostly responsible for the uncertainty in the model responses. Has the model undergone sensitivity analysis?

    yes
    Two sensitivity analysis techniques were used: An interval and a scenario analysis were carried out to quantify the range of uncertainty around the best estimate BCR values.

      Have model results been published in peer-reviewed articles?

      no

        Has the model formally undergone scientific review by a panel of international experts?

        Please note that this does not refer to the cases when model results were validated by stakeholders.

        no

          Model validation

          Has model validation been done? Have model predictions been confronted with observed data (ex-post)?

          yes
          The model has been verified during the course of implementation using dummy inputs and verifying the individual calculation steps data, but the model has not been validated ex-post.

            Transparency

            To what extent do input data come from publicly available sources?

            This may include sources accessible upon subscription and/or payment

            Based on both publicly available and restricted-access sources

            Is the full model database as such available to external users?

            Whether or not it implies a specific procedure or a fee

            no
            Collision databases used to create input data for the model (STATS19 and CARE) can be accessed at request to the database owner. Other input data was collected from literature and stakeholders and is provided in the project report (see References).

              Have model results been presented in publicly available reports?

              Note this excludes IA reports.

              yes

              Have output datasets been made publicly available?

              Note this could also imply a specific procedure or a fee.

              no
              Model results were made publicly available in the project report.

                Is there any user friendly interface presenting model results that is accessible to the public?

                For instance: Dashboard, interactive interfaces...

                no

                  Has the model been documented in a publicly available dedicated report or a manual?

                  Note this excludes IA reports.

                  yes
                  General model structure, input data and results are documented in a project report.

                  Is there a dedicated public website where information about the model is provided?

                  no

                    Is the model code open-source?

                    no

                    Can the code be accessed upon request?

                    no