- ENHANCING ROAD SAFETY MANAGEMENT WITH GIS MAPPING AND GEOSPATIAL DATABASE
ENHANCING ROAD SAFETY MANAGEMENT WITH GIS MAPPING AND GEOSPATIAL DATABASE
Reliable and accurate data are needed in each stage of road safety management in order to correctly identify problems and risk factors and priority treatments, and to formulate strategy, set targets and monitor performance. Ongoing, data-led diagnosis and management of the leading road safety problems enables appropriate action and resource allocation. Data relevant to road safety are collected every day, but for these data to be useful for informing road safety practice, they must be properly coded and visualized, processed and analysed in a systematic way. With the road system management strategy switching from 3Es to Safe System, there is additional challenges and demand for the integrated use of various types of road safety data. In this paper, the development of an integrated road safety data management system is introduced. The road safety data management system consists of a geospatial database for storing, querying and analysing road safety related data including crash records, road safety deficiency records, carriageway, surfacing, geometry, skid resistance, signs and road marking etc, and a GIS mapping platform for visualizing and integrating different data sets. Data from a State Highway network is used to demonstrate the potential application areas of the information system developed, such as identification of crash hot-spots, development of safety intervention and safety management strategies, planning of minor safety improvement programme, and investigation of severe and fatal crashes.
- 1. Enhancing road safety management with geospatial database and GIS mapping Dr Wei Liu GHD
2. Enhancing road safety management with geospatial database and GIS mapping Overview of Presentation Background Development of Integrated Road Safety Data Management System Demonstrations of Potential Applications Summary and Conclusions 3. Background Data is crucial Data is the cornerstone of all road safety activities and is essential for the diagnosis of road crashes and for monitoring road safety efforts. Without ongoing, data-led diagnosis and management of the leading road safety problems, it is difficult to achieve significant and sustainable road safety improvements. Define problems Identify risk factors and priorities Formulate Strategy Set targets and monitor performance 4. Background Data Use in Safe System Safer Journeys, New Zealands Road Safety Strategy 2010-20, adopts a safe system approach to road safety focused on creating safe roads, safe speeds, safe vehicles and safe road use. This approach represents a fundamental shift in the way we think about road safety, as there is the additional challenge and demand for integrated and effective use of various types of data to achieve our road safety targets 5. Background Data Management Issues Data Hard to Reach Data not in Friendly Format Data Rich, Intelligence Poor 6. Development of Integrated Road Safety Data Management System An integrated road safety data management system, consisting of a road safety database and a mapping tool, has been developed. WestWaikato State Highway Network GHD Integrated Road Safety Data Management System CAS Detailed Crash Information RAMM Road Safety Studies 7. Development of Integrated Road Safety Data Management System RAMM Carriageway Section Carriageway Surface Signs Road Markings Skid Resistance Out-of-Context Curves FWP 8. Development of Integrated Road Safety Data Management System Road Safety Studies 9. Spatial-Referenced Road Safety Database Spatial referenced road safety data Spatial queries designed to search within the available road safety related data to satisfy a given geometry condition Distance Overlap Contain Tools are available to convert data between a linear referencing system and a spatial referencing system. 10. Road Safety Data Mapping Visualises AllTypes of Road Safety Data in a Single Platform Integrates DifferentType of Road Safety Data Spatially Friendly and Easy-to-Use Interface Take Advantage of Functionalities and Information Layers (such as Streetview) within Google Earth / Map Convenient to Share Information with Others 11. Road Safety Data Mapping 12. Potential Applications Understanding safety risks in the network level Gathering information for road safety studies Safety improvement project identification and prioritisation hot spot analysis 13. Hot Spot Analysis 14. Summary and Conclusions Effective use of data is a challenge in road safety management under the safe system approach. An integrated road safety data management system has been developed by GHD, and has the potential to make the most of data. By applying the system , more informed decisions on road safety improvements can be achieved.