The detailed management and modelling of pavement assets and its associated investment appraisal is well advanced. HDM4 is considered as the world standard economic tool for such appraisal as it is associated with the work of organisations like PIARC and the World Bank. HDM4 provides a powerful system for road management, programming road works, estimating funding requirements, budget allocations, predicting road network performance, project appraisal and policy impact studies. It may consider road safety aspects but there are reasons to believe that a more explicit road safety management approach could add value. As there are road safety management models that may provide similar outcomes for the management of road safety across a road network, the proposed research will: • Compare available road safety and road appraisal investment models and examine their compatibility and potential integration. • Identify methods for the integration of safety and asset management assessment activities that maximize benefits to road users and stakeholders. • Undertake a detailed case study using the HDM-4 and safety models in a parallel investment assessment to highlight the potential for crash and injury reduction input to HDM4. • Define a specification to link HDM-4 with a road safety management model.
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